Re: [Avid-L2] Phillips Hue lights for a monitor backlight?

Or the flanders bias lighting . pretty cheap and effective

 

 

 

From: Avid-L2@groups.io <Avid-L2@groups.io> On Behalf Of Pat Horridge
Sent: 27 December 2019 11:20
To: Avid-L2@groups.io
Subject: Re: [Avid-L2] Phillips Hue lights for a monitor backlight?

 

Isn't it better and safer to just get 6500K bulbs? And you want a CRI that's as wide as possible.

Re dimming I'd be temped to use ND gel to dim if needed as its less likely to alter the colour temp.

 

 

Pat Horridge

 

From: Avid-L2@groups.io <Avid-L2@groups.io> On Behalf Of John Moore via Groups.Io
Sent: 26 December 2019 23:07
To: Avid L-2 Groups IO <avid-l2@groups.io>
Subject: [Avid-L2] Phillips Hue lights for a monitor backlight?

 

In my recent DolbyVision mastering class it was mentioned that the Phillips Hue Bulbs can be adjusted to proper color temperature for a monitor back light.  It says in the various info I've obtained that the White Ambience Bulb is controlled by blue tooth and it can have a color temp of 27002K to 6500K.  I picked up a couple lights and got them working.  The interface on my new iPhone, yes I finally retired the BlackBerry Torch, and I can swing the color temp but the interface is not set up with a degree Kelvin parameter.  It's either choose a preset or move the icon in a circle with the bottom going more blue white.  I'm assuming the bottom of the circle would be approx 6500K.

 

Anybody played with these bulbs using a real color temp meter or know if there is a way to get a preset that is designed to set the bulbs to 6500K white.

 

They also have dimming and I'm wondering it the dimming would effect color temp.  I know it did on tungsten lamps on the stage.

 

 

John Moore Barking Trout Productions Studio City, CA bigfish@pacbell.net

Re: [Avid-L2] LG OLED C9 number of internal LUTs for calibration?

Hi there

 

You can calibrate settings in the C( so you only need to use one HDMI input.. In fact I think the input is irrelevant. When you set up using calman the software creates a custom setting and you can have more than one.. HDR is a bit more involved because you have to be ableto put the TV in HDR mode so I think something that generates the Info in the HDMI stream.. AJA does this..

 

N

 

From: Avid-L2@groups.io <Avid-L2@groups.io> On Behalf Of John Moore
Sent: 26 December 2019 18:53
To: Avid L-2 Groups IO <avid-l2@groups.io>
Subject: [Avid-L2] LG OLED C9 number of internal LUTs for calibration?

 

It is my understanding that as of 2017 the LG OLED TVs have the ability to store a calibration LUT directly from the Calman Calibration software.  How many LUTs can be stored?  Is it a LUT per HDMI input?

 

I want to know if the monitors can be calibrated for both SDR and HDR?  Would I need to dedicate one HDMI input for SDR and one for HDR?  I'm assuming that for proper Calibration it needs to be done separately for HDR and SDR hence does the monitor have the ability to have Calman software program two different internal LUTs or inputs.

 

John Moore Barking Trout Productions Studio City, CA bigfish@pacbell.net

Re: [Avid-L2] Phillips Hue lights for a monitor backlight?

But due to the low power requirements of LED and their requirement for DC its possible to rectify and smooth AC to DC and have no flicker.

Pat Horridge

---

From: Avid-L2@groups.io <Avid-L2@groups.io> on behalf of Dave Hogan via Groups.Io <mactvman=yahoo.com@groups.io>
Sent: Saturday, December 28, 2019 12:59:06 AM
To: Avid-L2@groups.io <Avid-L2@groups.io>
Subject: Re: [Avid-L2] Phillips Hue lights for a monitor backlight?

 

Yes, as mentioned in my notes, LED bulbs share the same effect as fluorescents...they are subject to the frequency of their power source.  Because of their fast response to electricity they actually turn on and off as the AC circuit voltage swings on and off.  Therefore the makers for photographic lighting (motion and still) need to provide a high frequency source, just like in fluorescent lighting.

However, they aren't using a ballast, which often malfunctions, and makes fluorescent lights flicker worse than line frequency.

Dave Hogan,

Burbank, CA

On Dec 27, 2019, at 4:49 PM, John Moore <bigfish@pacbell.net> wrote:

This is interesting because if anything I have had more flicker and spectrum issues on shoots that have used LED lighting.  Perhaps the technology has improved but I was told by many that the spectrum of LED fixtures was very notched and one Lighting Director I know had to use a mixture of different LED fixtures to maintain a better color temp.  I've heard that you can dial in color temperature on some of the LED lights now.  Perhaps my friend was working with older LED lights but this was two or 3 years ago on a major cable talk show that he was the Lighting Director on.


On Fri, Dec 27, 2019 at 02:17 PM, Dave Hogan wrote:

The other problem with fluorescent lighting is that the CRI starts degrading right away and continues over the life of the unit.  They also have to "warm up" to get to their proper color temp.

 

LEDs on the other hand maintain their CRI throughout most of their much longer lifespan, and have no warm up period.

 

Thus fluorescent lights have a much higher maintenance cost, and unless you have high end monitoring equipment, you don't know what your color temp will be a week after you put them in.

 

The flicker issue can occur on cheap LED light sources too, they need to use high frequency sources as well.

 

And while we are on the subject of CRI…Fluorescent bulbs have spikes in their color range that have to be controlled with phosphors, whereas LEDs generally have a wider smooth range of light output.

 

LEDs are the way to go in every category, from quality of light, consistency and power savings.  LEDs do have a higher up front cost, but due to their much longer lifespan and greater power savings they are cheaper to operate.

 

My .02

 

Dave Hogan

Burbank, CA

 

On Dec 27, 2019, at 1:35 PM, Pat Horridge <pat@horridge.org.uk> wrote:

You need to go for High frequency fluorescent. They multiply up the frequency to make the flicker much less noticeable.

Pat Horridge

---

From: Avid-L2@groups.io <Avid-L2@groups.io> on behalf of John Moore via Groups.Io <bigfish=pacbell.net@groups.io>
Sent: Friday, December 27, 2019 9:24:47 PM
To: Avid-L2@groups.io <Avid-L2@groups.io>
Subject: Re: [Avid-L2] Phillips Hue lights for a monitor backlight?

 

A fellow editor told me he tried some fluorescent back lights and they flickered or made the monitor appear flickery.  He found one little fluorescent fixture that didn't seem to flicker.  I don't know what aspects of a fluorescent tube that would effect it's flickeryness and I wonder if it would depend on AC line frequency vs. monitor frame rate/refresh rate.


On Fri, Dec 27, 2019 at 03:39 AM, bouke wrote:

Or, why not use fluorescent tubes?

Those are dirt cheap, can have (if you spend a few buck more) a high CRI, produce close to no heat, and can be dimmed with pieces of gaffer tape if needed.

 

Can someone explain why a high CRI is important when the puropse is to the light a one-color wall? I would think the wall only reflects the color it was painted in.

So if that particular color is missing / lower in the light source, it simply would not come back. (And you have a free dimmer :-)

 

 

Bouke

Edit 'B / VideoToolShed.com
van Oldenbarneveltstraat 33
6512 AS  Nijmegen
+31 6 21817248

On 27 Dec 2019, at 12:20, Pat Horridge <pat@horridge.org.uk> wrote:

Isn't it better and safer to just get 6500K bulbs? And you want a CRI that's as wide as possible.

Re dimming I'd be temped to use ND gel to dim if needed as its less likely to alter the colour temp.

 

 

Pat Horridge

 

From: Avid-L2@groups.io <Avid-L2@groups.io> On Behalf Of John Moore via Groups.Io
Sent: 26 December 2019 23:07
To: Avid L-2 Groups IO <avid-l2@groups.io>
Subject: [Avid-L2] Phillips Hue lights for a monitor backlight?

 

In my recent DolbyVision mastering class it was mentioned that the Phillips Hue Bulbs can be adjusted to proper color temperature for a monitor back light.  It says in the various info I've obtained that the White Ambience Bulb is controlled by blue tooth and it can have a color temp of 27002K to 6500K.  I picked up a couple lights and got them working.  The interface on my new iPhone, yes I finally retired the BlackBerry Torch, and I can swing the color temp but the interface is not set up with a degree Kelvin parameter.  It's either choose a preset or move the icon in a circle with the bottom going more blue white.  I'm assuming the bottom of the circle would be approx 6500K.

 

Anybody played with these bulbs using a real color temp meter or know if there is a way to get a preset that is designed to set the bulbs to 6500K white.

 

They also have dimming and I'm wondering it the dimming would effect color temp.  I know it did on tungsten lamps on the stage.

 

 

John Moore Barking Trout Productions Studio City, CA bigfish@pacbell.net

 

Re: [Avid-L2] Phillips Hue lights for a monitor backlight?

Yes, as mentioned in my notes, LED bulbs share the same effect as fluorescents...they are subject to the frequency of their power source.  Because of their fast response to electricity they actually turn on and off as the AC circuit voltage swings on and off.  Therefore the makers for photographic lighting (motion and still) need to provide a high frequency source, just like in fluorescent lighting.

However, they aren't using a ballast, which often malfunctions, and makes fluorescent lights flicker worse than line frequency.

Dave Hogan,

Burbank, CA

On Dec 27, 2019, at 4:49 PM, John Moore <bigfish@pacbell.net> wrote:

This is interesting because if anything I have had more flicker and spectrum issues on shoots that have used LED lighting.  Perhaps the technology has improved but I was told by many that the spectrum of LED fixtures was very notched and one Lighting Director I know had to use a mixture of different LED fixtures to maintain a better color temp.  I've heard that you can dial in color temperature on some of the LED lights now.  Perhaps my friend was working with older LED lights but this was two or 3 years ago on a major cable talk show that he was the Lighting Director on.


On Fri, Dec 27, 2019 at 02:17 PM, Dave Hogan wrote:

The other problem with fluorescent lighting is that the CRI starts degrading right away and continues over the life of the unit.  They also have to "warm up" to get to their proper color temp.

 

LEDs on the other hand maintain their CRI throughout most of their much longer lifespan, and have no warm up period.

 

Thus fluorescent lights have a much higher maintenance cost, and unless you have high end monitoring equipment, you don't know what your color temp will be a week after you put them in.

 

The flicker issue can occur on cheap LED light sources too, they need to use high frequency sources as well.

 

And while we are on the subject of CRI…Fluorescent bulbs have spikes in their color range that have to be controlled with phosphors, whereas LEDs generally have a wider smooth range of light output.

 

LEDs are the way to go in every category, from quality of light, consistency and power savings.  LEDs do have a higher up front cost, but due to their much longer lifespan and greater power savings they are cheaper to operate.

 

My .02

 

Dave Hogan

Burbank, CA

 

On Dec 27, 2019, at 1:35 PM, Pat Horridge <pat@horridge.org.uk> wrote:

You need to go for High frequency fluorescent. They multiply up the frequency to make the flicker much less noticeable.

Pat Horridge

---

From: Avid-L2@groups.io <Avid-L2@groups.io> on behalf of John Moore via Groups.Io <bigfish=pacbell.net@groups.io>
Sent: Friday, December 27, 2019 9:24:47 PM
To: Avid-L2@groups.io <Avid-L2@groups.io>
Subject: Re: [Avid-L2] Phillips Hue lights for a monitor backlight?

 

A fellow editor told me he tried some fluorescent back lights and they flickered or made the monitor appear flickery.  He found one little fluorescent fixture that didn't seem to flicker.  I don't know what aspects of a fluorescent tube that would effect it's flickeryness and I wonder if it would depend on AC line frequency vs. monitor frame rate/refresh rate.


On Fri, Dec 27, 2019 at 03:39 AM, bouke wrote:

Or, why not use fluorescent tubes?

Those are dirt cheap, can have (if you spend a few buck more) a high CRI, produce close to no heat, and can be dimmed with pieces of gaffer tape if needed.

 

Can someone explain why a high CRI is important when the puropse is to the light a one-color wall? I would think the wall only reflects the color it was painted in.

So if that particular color is missing / lower in the light source, it simply would not come back. (And you have a free dimmer :-)

 

 

Bouke

Edit 'B / VideoToolShed.com
van Oldenbarneveltstraat 33
6512 AS  Nijmegen
+31 6 21817248

On 27 Dec 2019, at 12:20, Pat Horridge <pat@horridge.org.uk> wrote:

Isn't it better and safer to just get 6500K bulbs? And you want a CRI that's as wide as possible.

Re dimming I'd be temped to use ND gel to dim if needed as its less likely to alter the colour temp.

 

 

Pat Horridge

 

From: Avid-L2@groups.io <Avid-L2@groups.io> On Behalf Of John Moore via Groups.Io
Sent: 26 December 2019 23:07
To: Avid L-2 Groups IO <avid-l2@groups.io>
Subject: [Avid-L2] Phillips Hue lights for a monitor backlight?

 

In my recent DolbyVision mastering class it was mentioned that the Phillips Hue Bulbs can be adjusted to proper color temperature for a monitor back light.  It says in the various info I've obtained that the White Ambience Bulb is controlled by blue tooth and it can have a color temp of 27002K to 6500K.  I picked up a couple lights and got them working.  The interface on my new iPhone, yes I finally retired the BlackBerry Torch, and I can swing the color temp but the interface is not set up with a degree Kelvin parameter.  It's either choose a preset or move the icon in a circle with the bottom going more blue white.  I'm assuming the bottom of the circle would be approx 6500K.

 

Anybody played with these bulbs using a real color temp meter or know if there is a way to get a preset that is designed to set the bulbs to 6500K white.

 

They also have dimming and I'm wondering it the dimming would effect color temp.  I know it did on tungsten lamps on the stage.

 

 

John Moore Barking Trout Productions Studio City, CA bigfish@pacbell.net

 

Re: [Avid-L2] Phillips Hue lights for a monitor backlight?

This is interesting because if anything I have had more flicker and spectrum issues on shoots that have used LED lighting.  Perhaps the technology has improved but I was told by many that the spectrum of LED fixtures was very notched and one Lighting Director I know had to use a mixture of different LED fixtures to maintain a better color temp.  I've heard that you can dial in color temperature on some of the LED lights now.  Perhaps my friend was working with older LED lights but this was two or 3 years ago on a major cable talk show that he was the Lighting Director on.


On Fri, Dec 27, 2019 at 02:17 PM, Dave Hogan wrote:

The other problem with fluorescent lighting is that the CRI starts degrading right away and continues over the life of the unit.  They also have to “warm up” to get to their proper color temp.

 

LEDs on the other hand maintain their CRI throughout most of their much longer lifespan, and have no warm up period.

 

Thus fluorescent lights have a much higher maintenance cost, and unless you have high end monitoring equipment, you don’t know what your color temp will be a week after you put them in.

 

The flicker issue can occur on cheap LED light sources too, they need to use high frequency sources as well.

 

And while we are on the subject of CRI…Fluorescent bulbs have spikes in their color range that have to be controlled with phosphors, whereas LEDs generally have a wider smooth range of light output.

 

LEDs are the way to go in every category, from quality of light, consistency and power savings.  LEDs do have a higher up front cost, but due to their much longer lifespan and greater power savings they are cheaper to operate.

 

My .02

 

Dave Hogan

Burbank, CA

 

On Dec 27, 2019, at 1:35 PM, Pat Horridge <pat@horridge.org.uk> wrote:

You need to go for High frequency fluorescent. They multiply up the frequency to make the flicker much less noticeable.

Pat Horridge

---

From: Avid-L2@groups.io <Avid-L2@groups.io> on behalf of John Moore via Groups.Io <bigfish=pacbell.net@groups.io>
Sent: Friday, December 27, 2019 9:24:47 PM
To: Avid-L2@groups.io <Avid-L2@groups.io>
Subject: Re: [Avid-L2] Phillips Hue lights for a monitor backlight?

 

A fellow editor told me he tried some fluorescent back lights and they flickered or made the monitor appear flickery.  He found one little fluorescent fixture that didn't seem to flicker.  I don't know what aspects of a fluorescent tube that would effect it's flickeryness and I wonder if it would depend on AC line frequency vs. monitor frame rate/refresh rate.


On Fri, Dec 27, 2019 at 03:39 AM, bouke wrote:

Or, why not use fluorescent tubes?

Those are dirt cheap, can have (if you spend a few buck more) a high CRI, produce close to no heat, and can be dimmed with pieces of gaffer tape if needed.

 

Can someone explain why a high CRI is important when the puropse is to the light a one-color wall? I would think the wall only reflects the color it was painted in.

So if that particular color is missing / lower in the light source, it simply would not come back. (And you have a free dimmer :-)

 

 

Bouke

Edit ‘B / VideoToolShed.com
van Oldenbarneveltstraat 33
6512 AS  Nijmegen
+31 6 21817248

On 27 Dec 2019, at 12:20, Pat Horridge <pat@horridge.org.uk> wrote:

Isn’t it better and safer to just get 6500K bulbs? And you want a CRI that’s as wide as possible.

Re dimming I’d be temped to use ND gel to dim if needed as its less likely to alter the colour temp.

 

 

Pat Horridge

 

From: Avid-L2@groups.io <Avid-L2@groups.io> On Behalf Of John Moore via Groups.Io
Sent: 26 December 2019 23:07
To: Avid L-2 Groups IO <avid-l2@groups.io>
Subject: [Avid-L2] Phillips Hue lights for a monitor backlight?

 

In my recent DolbyVision mastering class it was mentioned that the Phillips Hue Bulbs can be adjusted to proper color temperature for a monitor back light.  It says in the various info I've obtained that the White Ambience Bulb is controlled by blue tooth and it can have a color temp of 27002K to 6500K.  I picked up a couple lights and got them working.  The interface on my new iPhone, yes I finally retired the BlackBerry Torch, and I can swing the color temp but the interface is not set up with a degree Kelvin parameter.  It's either choose a preset or move the icon in a circle with the bottom going more blue white.  I'm assuming the bottom of the circle would be approx 6500K.

 

Anybody played with these bulbs using a real color temp meter or know if there is a way to get a preset that is designed to set the bulbs to 6500K white.

 

They also have dimming and I'm wondering it the dimming would effect color temp.  I know it did on tungsten lamps on the stage.

 

 

John Moore Barking Trout Productions Studio City, CA bigfish@pacbell.net

 

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Re: [Avid-L2] Phillips Hue lights for a monitor backlight?

The other problem with fluorescent lighting is that the CRI starts degrading right away and continues over the life of the unit.  They also have to "warm up" to get to their proper color temp.

LEDs on the other hand maintain their CRI throughout most of their much longer lifespan, and have no warm up period.

Thus fluorescent lights have a much higher maintenance cost, and unless you have high end monitoring equipment, you don't know what your color temp will be a week after you put them in.

The flicker issue can occur on cheap LED light sources too, they need to use high frequency sources as well.

And while we are on the subject of CRI…Fluorescent bulbs have spikes in their color range that have to be controlled with phosphors, whereas LEDs generally have a wider smooth range of light output.

LEDs are the way to go in every category, from quality of light, consistency and power savings.  LEDs do have a higher up front cost, but due to their much longer lifespan and greater power savings they are cheaper to operate.

My .02

Dave Hogan

Burbank, CA

On Dec 27, 2019, at 1:35 PM, Pat Horridge <pat@horridge.org.uk> wrote:

You need to go for High frequency fluorescent. They multiply up the frequency to make the flicker much less noticeable.

Pat Horridge

---

From: Avid-L2@groups.io <Avid-L2@groups.io> on behalf of John Moore via Groups.Io <bigfish=pacbell.net@groups.io>
Sent: Friday, December 27, 2019 9:24:47 PM
To: Avid-L2@groups.io <Avid-L2@groups.io>
Subject: Re: [Avid-L2] Phillips Hue lights for a monitor backlight?

 

A fellow editor told me he tried some fluorescent back lights and they flickered or made the monitor appear flickery.  He found one little fluorescent fixture that didn't seem to flicker.  I don't know what aspects of a fluorescent tube that would effect it's flickeryness and I wonder if it would depend on AC line frequency vs. monitor frame rate/refresh rate.


On Fri, Dec 27, 2019 at 03:39 AM, bouke wrote:

Or, why not use fluorescent tubes?

Those are dirt cheap, can have (if you spend a few buck more) a high CRI, produce close to no heat, and can be dimmed with pieces of gaffer tape if needed.

 

Can someone explain why a high CRI is important when the puropse is to the light a one-color wall? I would think the wall only reflects the color it was painted in.

So if that particular color is missing / lower in the light source, it simply would not come back. (And you have a free dimmer :-)

 

 

Bouke

Edit 'B / VideoToolShed.com
van Oldenbarneveltstraat 33
6512 AS  Nijmegen
+31 6 21817248

On 27 Dec 2019, at 12:20, Pat Horridge <pat@horridge.org.uk> wrote:

Isn't it better and safer to just get 6500K bulbs? And you want a CRI that's as wide as possible.

Re dimming I'd be temped to use ND gel to dim if needed as its less likely to alter the colour temp.

 

 

Pat Horridge

 

From: Avid-L2@groups.io <Avid-L2@groups.io> On Behalf Of John Moore via Groups.Io
Sent: 26 December 2019 23:07
To: Avid L-2 Groups IO <avid-l2@groups.io>
Subject: [Avid-L2] Phillips Hue lights for a monitor backlight?

 

In my recent DolbyVision mastering class it was mentioned that the Phillips Hue Bulbs can be adjusted to proper color temperature for a monitor back light.  It says in the various info I've obtained that the White Ambience Bulb is controlled by blue tooth and it can have a color temp of 27002K to 6500K.  I picked up a couple lights and got them working.  The interface on my new iPhone, yes I finally retired the BlackBerry Torch, and I can swing the color temp but the interface is not set up with a degree Kelvin parameter.  It's either choose a preset or move the icon in a circle with the bottom going more blue white.  I'm assuming the bottom of the circle would be approx 6500K.

 

Anybody played with these bulbs using a real color temp meter or know if there is a way to get a preset that is designed to set the bulbs to 6500K white.

 

They also have dimming and I'm wondering it the dimming would effect color temp.  I know it did on tungsten lamps on the stage.

 

 

John Moore Barking Trout Productions Studio City, CA bigfish@pacbell.net

 

Re: [Avid-L2] Phillips Hue lights for a monitor backlight?

You need to go for High frequency fluorescent. They multiply up the frequency to make the flicker much less noticeable.

Pat Horridge

---

From: Avid-L2@groups.io <Avid-L2@groups.io> on behalf of John Moore via Groups.Io <bigfish=pacbell.net@groups.io>
Sent: Friday, December 27, 2019 9:24:47 PM
To: Avid-L2@groups.io <Avid-L2@groups.io>
Subject: Re: [Avid-L2] Phillips Hue lights for a monitor backlight?

 

A fellow editor told me he tried some fluorescent back lights and they flickered or made the monitor appear flickery.  He found one little fluorescent fixture that didn't seem to flicker.  I don't know what aspects of a fluorescent tube that would effect it's flickeryness and I wonder if it would depend on AC line frequency vs. monitor frame rate/refresh rate.


On Fri, Dec 27, 2019 at 03:39 AM, bouke wrote:

Or, why not use fluorescent tubes?

Those are dirt cheap, can have (if you spend a few buck more) a high CRI, produce close to no heat, and can be dimmed with pieces of gaffer tape if needed.

 

Can someone explain why a high CRI is important when the puropse is to the light a one-color wall? I would think the wall only reflects the color it was painted in.

So if that particular color is missing / lower in the light source, it simply would not come back. (And you have a free dimmer :-)

 

 

Bouke

Edit 'B / VideoToolShed.com
van Oldenbarneveltstraat 33
6512 AS  Nijmegen
+31 6 21817248

On 27 Dec 2019, at 12:20, Pat Horridge <pat@horridge.org.uk> wrote:

Isn't it better and safer to just get 6500K bulbs? And you want a CRI that's as wide as possible.

Re dimming I'd be temped to use ND gel to dim if needed as its less likely to alter the colour temp.

 

 

Pat Horridge

 

From: Avid-L2@groups.io <Avid-L2@groups.io> On Behalf Of John Moore via Groups.Io
Sent: 26 December 2019 23:07
To: Avid L-2 Groups IO <avid-l2@groups.io>
Subject: [Avid-L2] Phillips Hue lights for a monitor backlight?

 

In my recent DolbyVision mastering class it was mentioned that the Phillips Hue Bulbs can be adjusted to proper color temperature for a monitor back light.  It says in the various info I've obtained that the White Ambience Bulb is controlled by blue tooth and it can have a color temp of 27002K to 6500K.  I picked up a couple lights and got them working.  The interface on my new iPhone, yes I finally retired the BlackBerry Torch, and I can swing the color temp but the interface is not set up with a degree Kelvin parameter.  It's either choose a preset or move the icon in a circle with the bottom going more blue white.  I'm assuming the bottom of the circle would be approx 6500K.

 

Anybody played with these bulbs using a real color temp meter or know if there is a way to get a preset that is designed to set the bulbs to 6500K white.

 

They also have dimming and I'm wondering it the dimming would effect color temp.  I know it did on tungsten lamps on the stage.

 

 

John Moore Barking Trout Productions Studio City, CA bigfish@pacbell.net

 

Re: [Avid-L2] Phillips Hue lights for a monitor backlight?

A fellow editor told me he tried some fluorescent back lights and they flickered or made the monitor appear flickery.  He found one little fluorescent fixture that didn't seem to flicker.  I don't know what aspects of a fluorescent tube that would effect it's flickeryness and I wonder if it would depend on AC line frequency vs. monitor frame rate/refresh rate.


On Fri, Dec 27, 2019 at 03:39 AM, bouke wrote:

Or, why not use fluorescent tubes?

Those are dirt cheap, can have (if you spend a few buck more) a high CRI, produce close to no heat, and can be dimmed with pieces of gaffer tape if needed.

 

Can someone explain why a high CRI is important when the puropse is to the light a one-color wall? I would think the wall only reflects the color it was painted in.

So if that particular color is missing / lower in the light source, it simply would not come back. (And you have a free dimmer :-)

 

 

Bouke

Edit 'B / VideoToolShed.com
van Oldenbarneveltstraat 33
6512 AS  Nijmegen
+31 6 21817248

On 27 Dec 2019, at 12:20, Pat Horridge <pat@horridge.org.uk> wrote:

Isn't it better and safer to just get 6500K bulbs? And you want a CRI that's as wide as possible.

Re dimming I'd be temped to use ND gel to dim if needed as its less likely to alter the colour temp.

 

 

Pat Horridge

 

From: Avid-L2@groups.io <Avid-L2@groups.io> On Behalf Of John Moore via Groups.Io
Sent: 26 December 2019 23:07
To: Avid L-2 Groups IO <avid-l2@groups.io>
Subject: [Avid-L2] Phillips Hue lights for a monitor backlight?

 

In my recent DolbyVision mastering class it was mentioned that the Phillips Hue Bulbs can be adjusted to proper color temperature for a monitor back light.  It says in the various info I've obtained that the White Ambience Bulb is controlled by blue tooth and it can have a color temp of 27002K to 6500K.  I picked up a couple lights and got them working.  The interface on my new iPhone, yes I finally retired the BlackBerry Torch, and I can swing the color temp but the interface is not set up with a degree Kelvin parameter.  It's either choose a preset or move the icon in a circle with the bottom going more blue white.  I'm assuming the bottom of the circle would be approx 6500K.

 

Anybody played with these bulbs using a real color temp meter or know if there is a way to get a preset that is designed to set the bulbs to 6500K white.

 

They also have dimming and I'm wondering it the dimming would effect color temp.  I know it did on tungsten lamps on the stage.

 

 

John Moore Barking Trout Productions Studio City, CA bigfish@pacbell.net

 

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Re: [Avid-L2] Phillips Hue lights for a monitor backlight?

This is what I stuck behind my monitor:
https://www.amazon.com/MediaLight-Bias-Lighting-System-Controlled/dp/B06Y2FSYQY/ref=sr_1_4?ie=UTF8&qid=1541107462&sr=8-4&keywords=media+light
I know Steve Hullfish uses one as well.
J


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Re: [Avid-L2] Phillips Hue lights for a monitor backlight?

On Thu, Dec 26, 2019 at 03:33 PM, Gowanus Canal wrote:

I’m not familiar with Philips Hue. What is the CRI rating? I would not use any LEDs in a grading room lower than 90 CRI. 

DQS

From the Phillips website:

What is the color rendering index?

 

The effect of a light source on color appearance is measured in the color rendering index (CRI), on a scale of 0-100. Natural outdoor light has a CRI of 100 and is used as the standard of comparison for any other light source.

 

The CRI of Philips LED lighting products is always higher than 80, close to the sun’s value. Colors are reflected truly and naturally. The illustrations to the left show how CRI can affect the appearance of color. When shopping for bulbs, look for a high CRI to get the best color.

What is the color rendering index?

 

The effect of a light source on color appearance is measured in the color rendering index (CRI), on a scale of 0-100. Natural outdoor light has a CRI of 100 and is used as the standard of comparison for any other light source.

 

The CRI of Philips LED lighting products is always higher than 80, close to the sun’s value. Colors are reflected truly and naturally. The illustrations to the left show how CRI can affect the appearance of color. When shopping for bulbs, look for a high CRI to get the best color.

 

On Dec 26, 2019, at 6:07 PM, John Moore <bigfish@pacbell.net> wrote:

In my recent DolbyVision mastering class it was mentioned that the Phillips Hue Bulbs can be adjusted to proper color temperature for a monitor back light.  It says in the various info I've obtained that the White Ambience Bulb is controlled by blue tooth and it can have a color temp of 27002K to 6500K.  I picked up a couple lights and got them working.  The interface on my new iPhone, yes I finally retired the BlackBerry Torch, and I can swing the color temp but the interface is not set up with a degree Kelvin parameter.  It's either choose a preset or move the icon in a circle with the bottom going more blue white.  I'm assuming the bottom of the circle would be approx 6500K.

 

Anybody played with these bulbs using a real color temp meter or know if there is a way to get a preset that is designed to set the bulbs to 6500K white.

 

They also have dimming and I'm wondering it the dimming would effect color temp.  I know it did on tungsten lamps on the stage.

 

 

John Moore Barking Trout Productions Studio City, CA bigfish@pacbell.net

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Re: [Avid-L2] Blackmagic UltraStudio 4K Mini

In my recent HDR experimentation I'm finding that if you have any need for passing DolbyVision metadata down an HDMI path you need the Ultrastudio 4K Extreme or the PCIe Card version IIRC the 4K Extreme.  I have yet to confirm or deny whether my DNxIO would be able to pass HDMI DolbyVision metadata or if the DNxIQ will  do it.  I emailed Black Magic and big surprise no response yet and it's been several weeks.  If anyone at Avid has any knowledge about how the Avid DNxIO handles passing HDMI metadata when used with Resolve and or Avid that would be helpful.

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Re: [Avid-L2] Blackmagic UltraStudio 4K Mini

Thanks Rupert! 

On 27 Dec 2019, at 20:12, Rupert Watson <rupertwatson@gmail.com> wrote:

Works fine. A few Open IO quirks and no audio in on the front or audio punch in support IIRC. 

On Fri, 27 Dec 2019 at 19:08, Knut A. Helgeland via Groups.Io <kahelia=me.com@groups.io> wrote:

Hi guys,

I'm considering this unit, seems to be the same as Avid Artist DNxID, except it has a few more io's. Anyone have experience or info on this, and how they compare?

_______________
Knut A. Helgeland
mailto:Knut@dtox.as
_______________



_______________
Knut A. Helgeland
mailto:Knut@Toxic.no
_______________

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Rupert Watson
+44 7787 554801

Re: [Avid-L2] Blackmagic UltraStudio 4K Mini

Works fine. A few Open IO quirks and no audio in on the front or audio punch in support IIRC. 

On Fri, 27 Dec 2019 at 19:08, Knut A. Helgeland via Groups.Io <kahelia=me.com@groups.io> wrote:

Hi guys,

I'm considering this unit, seems to be the same as Avid Artist DNxID, except it has a few more io's. Anyone have experience or info on this, and how they compare?

_______________
Knut A. Helgeland
mailto:Knut@dtox.as
_______________



_______________
Knut A. Helgeland
mailto:Knut@Toxic.no
_______________

--

Rupert Watson
+44 7787 554801

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[Avid-L2] Blackmagic UltraStudio 4K Mini

Hi guys,

I'm considering this unit, seems to be the same as Avid Artist DNxID, except it has a few more io's. Anyone have experience or info on this, and how they compare?

_______________
Knut A. Helgeland
mailto:Knut@dtox.as
_______________



_______________
Knut A. Helgeland
mailto:Knut@Toxic.no
_______________



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Re: [Avid-L2] Phillips Hue lights for a monitor backlight?

On 27 Dec 2019, at 12:59, Pat Horridge <pat@horridge.org.uk> wrote:

(otherwise its actually a coloured wall)

Yes, that makes sense!

Thanks!

Bouke

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