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Bias Lighting for a 65" Display?


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#1 of 50 OFFLINE   Ronald Epstein

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Posted January 12 2014 - 10:50 AM

Decided it is time to put some backlighting behind my 65" Samsung plasma.

 

Anyone have suggestions for decent lighting?  Amazon has a few choices but I am uncertain how good they are.

 

I also heard that the lighting needs to be the correct temperature.  So, I suppose that would be an important factor.

 

Thank You


 

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#2 of 50 OFFLINE   Jim Mcc

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Posted January 12 2014 - 12:13 PM

What made you decide this?



#3 of 50 OFFLINE   Ronald Epstein

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Posted January 12 2014 - 12:14 PM

Have read many positive reviews that such lighting not only relieves

eye strain when watching content in a totally darkened environment,

but also raises black levels.


 

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#4 of 50 OFFLINE   schan1269

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Posted January 12 2014 - 12:39 PM

Philips tried this a few year's back...and look where it got them...

Coloring is up to you, and room decor. I've designed low level(as in where in the room) about two feet off the floor(think movie theatre aisle lighting).

I would, essentially, choose one "color" for all the lighting in the room. Some like 6k, some like 4k.

I actually went 6.5k in my office.

#5 of 50 OFFLINE   Ronald Epstein

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Posted January 12 2014 - 12:44 PM

Thanks, Sam.

 

Amazon had some choices:

 

http://www.amazon.co...=I27TIP59PI4FSK

 

http://www.amazon.co...d=IWN4OPICRZFK3

 

Just not sure how good they are (despite mostly positive reviews) or if anyone

recommends something better.


 

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#6 of 50 OFFLINE   schan1269

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Posted January 12 2014 - 12:49 PM

Looks like a re-packaged rope light(the second one)

#7 of 50 OFFLINE   Ronald Epstein

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Posted January 12 2014 - 12:58 PM

This one is actually being recommended if I buy two of them...

 

http://www.amazon.co...V bias lighting


 

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#8 of 50 OFFLINE   schan1269

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Posted January 12 2014 - 01:26 PM

I went and read(on phone so don't know how to link) the 2009 article George(of CinemaQuest) wrote on this forum.

Bias kits are common to buy because they come with short tube lights and mounting stuff.

Rope light, then, were inconsistent in "were they really 6500k" . That isn't so much the case anymore. Sure, there are crap rope lights. But crap tube lights exist as well.

Granted 6500k white is the recommended bias. In a pure controlled light room, sure. In your living room with connected kitchen/ hallway etc...match your lights.

However, don't just match the K. If you got ccfl, get a set of ccfl tubes. If you've bought LED bulbs, get led bulbs(rope or tube).

#9 of 50 OFFLINE   GeorgeAB

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Posted January 12 2014 - 05:30 PM

Get the correct facts:

 

'D65 Video Bias Lighting Fundamental Theory and Practice'

 

'The Importance Of Viewing Environment Conditions In A Reference Display System'

 

'The Room Is A Video Component' YouTube Video, 1 Hr.

 

Best regards and beautiful pictures,

G. Alan Brown, President

CinemaQuest, Inc.

A Lion AV Consultants affiliate

 

"Advancing the art and science of electronic imaging"



#10 of 50 OFFLINE   schan1269

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Posted January 12 2014 - 05:59 PM

By the way. Not disagreeing that 6500k is the best choice, but.

Back when incandescent ruled the roost, sure...6500 fluorescent sucked out yellow light.

This is now 2014, incandescent is dead. I've not run across anybody that doesn't buy "whiter light" bulbs.

If the room has whiter bulbs, to me, and the real world buying...yes 6500 is best.

However, if your lighting in the room is not yellow anymore...you could reduce the bias down.

My recommendation comes from dealing with wives going "but it ruins the color of my flowers". Bias, even if the wrong color, is better than nothing.

#11 of 50 OFFLINE   Jim Mcc

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Posted January 12 2014 - 09:24 PM

Have read many positive reviews that such lighting not only relieves

eye strain when watching content in a totally darkened environment,

but also raises black levels.

 

Raises black levels? To me, that means blacks are lighter, and that's a bad thing.



#12 of 50 OFFLINE   GeorgeAB

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Posted January 12 2014 - 10:12 PM

By the way. Not disagreeing that 6500k is the best choice, but.

Back when incandescent ruled the roost, sure...6500 fluorescent sucked out yellow light.

This is now 2014, incandescent is dead. I've not run across anybody that doesn't buy "whiter light" bulbs.

If the room has whiter bulbs, to me, and the real world buying...yes 6500 is best.

However, if your lighting in the room is not yellow anymore...you could reduce the bias down.

My recommendation comes from dealing with wives going "but it ruins the color of my flowers". Bias, even if the wrong color, is better than nothing.

Choosing the color of bias lighting pertains to only a singular purpose- to come as close as possible to match the international standard white point of the video display, which should be D65.



#13 of 50 OFFLINE   schan1269

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Posted January 12 2014 - 10:35 PM

Not that I'm arguing against D65/6500K lighting...but.

Philips did this long ago with bias that matched the "primary color displayed at the time". Hugely annoying, but the same purpose.

I've found times it made more sense(to me) to change up the bias...for two reasons...

The content you were watching was never close to D65.

People wanted the room lighting to match.

I get the whole "video mastered at" and "calibration to do".

All fine and dandy, until your content doesn't reach that goal. I've done two colors of bias for clients before.

6500K for when the content was going to advantage, and another around 5-5.5 to match the remaining room light. Then the client, by trial and error, can switch between.

I watched The Whip and the Body and Pit and the Pendulum the same night. 6500K bias would have been distracting.

2001, you bet I used 6500k.

#14 of 50 OFFLINE   Jim Mcc

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Posted January 13 2014 - 12:05 AM

I don't want any part of using bias lighting. The darker the room, the better. As my elderly mother would say, "What a bunch of hooey" !!



#15 of 50 OFFLINE   Type A

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Posted January 13 2014 - 03:59 AM

Creating light pollution in your viewing enviroment is not the answer.  If you are experiencing eye strain adjust the brightness of your display. 


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#16 of 50 OFFLINE   Ronald Epstein

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Posted January 13 2014 - 07:53 AM

Creating light pollution in your viewing enviroment is not the answer.  If you are experiencing eye strain adjust the brightness of your display. 

 

...wow...and I have a top calibrator recommending that I get

bias lighting.  So who do I believe?

 

...and reading some of the reviews on Amazon, it appears a

majority of people using bias lighting are seeing improved performance

from their display (or rather, the way the display and light interact).


 

Ronald J Epstein
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#17 of 50 OFFLINE   Robert Crawford

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Posted January 13 2014 - 08:25 AM

If you're happy with what you're seeing now, why mess with it?

Crawdaddy

 

Blu-ray Preorder Listing

 


#18 of 50 OFFLINE   Ronald Epstein

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Posted January 13 2014 - 09:17 AM

If you're happy with what you're seeing now, why mess with it? 

 

A few reasons....

 

First, Gregg Loewen, one of the top calibrators in the country, sent me a backlighting

kit with the recommendation to use it.  Unfortunately, I had a pet destroy it and I never

got to use the kit.

 

Now I have a rather bright display.  I prefer it bright, but I admit, the brightness does

seem to cause a little eye fatigue.  Reading the reviews on Amazon, it seems that bias

lighting greatly improves the overall viewing experience.

 

If you have the time, you may be surprised what you read...

 

http://www.amazon.co...0?ie=UTF8&psc=1

 

The lights are rather cheap.  I would buy two sets.

 

BTW, spoke with Gregg on the phone a week ago -- didn't even mention bias lighting --

and he brought it up in conversation saying it would be a good idea to use to raise black

levels even further.

 

Read some of those Amazon reviews and you'll find owners commenting they got better

black levels (not that I am unhappy with the black levels right now)


 

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#19 of 50 OFFLINE   schan1269

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Posted January 13 2014 - 09:22 AM

Not sure how well this works, but would run off the USB on the TV(provided you get a hub...you'd need three)

 

http://www.amazon.co...ghting for hdtv

 

Edit:

 

That's what I get for using my phone yesterday. You already linked the one they design for HDTV with a USB.



#20 of 50 OFFLINE   Ronald Epstein

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Posted January 13 2014 - 09:24 AM

Sam,

Thank you, Sir.  Pretty much the same thing (and company) in my link in post #18 above yours.

 

It will be either one of those that I will order.  


 

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