High Def Forum
Thank you for visiting. This is our website archive. Please visit our main website by clicking the logo above.

Back lighting?

22ozCthulhu
03-26-2010, 07:07 PM
I've seen in some photos that some people have, behind their HDTVs, a small glowing back light for watching movies. I love this effect!, and as I am preparing for my first HDTV, I would like to set up something like this in my living room. :D

Are these small LED lights? If anyone has any recommendations for what kinds of lights to get, what to avoid, etc, I'd highly appreciate it.

Thank you in advance!

Loves2Watch
03-26-2010, 08:52 PM
Look for some 65k rope lighting...

sbdeelo
03-26-2010, 08:59 PM
PLease let me know if you find some.

mschupp
03-27-2010, 10:23 AM
Here's an article on why you should back-light your TV.

http://reviews.cnet.com/4520-11247_7-6217705-1.html

I have a RP set so I just did what that article suggested and used a fluorescent fixture with a daylight bulb.

I did find led strip lights here: http://www.slashgear.com/illuminaire-led-tv-backlighting-239832/ (http://www.slashgear.com/illuminaire-led-tv-backlighting-239832/) but they are kind of pricey and from the photos they don't appear to be the correct color.

Here's something a bit cheaper: http://www.amazon.com/gp/offer-listing/B00390L5SE/ref=dp_olp_new?ie=UTF8&qid=1269706844&sr=8-1&condition=new

Loves2Watch
03-27-2010, 10:27 AM
Here's an article on why you should back-light your TV.

http://reviews.cnet.com/4520-11247_7-6217705-1.html

I have a RP set so I just did what that article suggested and used a fluorescent fixture with a daylight bulb.

I did find led strip lights here: http://www.slashgear.com/illuminaire-led-tv-backlighting-239832/ (http://www.slashgear.com/illuminaire-led-tv-backlighting-239832/) but they are kind of pricey and from the photos they don't appear to be the correct color.

Here's something a bit cheaper: http://www.amazon.com/gp/offer-listing/B00390L5SE/ref=dp_olp_new?ie=UTF8&qid=1269706844&sr=8-1&condition=new

The last link are lights of the correct color temperature and what I would recommend.

And BTW it is called bias lighting...

Scottnot
03-27-2010, 11:49 AM
I can quite easily grasp the concept of some light behind the TV to ease eyestrain.

What I fail to understand it the need for a 6500K source . . .
unless the walls that will be reflecting the light are pure black or pure white,
the light reaching your eyes will not be anywhere near 6500K;
it could literally be anywhere in the spectrum depending on wall color.

For that reason, I don't buy CNET's claim that:
"the backlighting will provide just enough light for your eyes to get their color reference,
and you'll find that pictures seem a little crisper and colors more vivid"
. . . it just doesn't pass the common sense test.

22ozCthulhu
03-28-2010, 08:23 AM
Here's an article on why you should back-light your TV..

Thanks for posting this!

22ozCthulhu
03-28-2010, 08:26 AM
The last link are lights of the correct color temperature and what I would recommend.

And BTW it is called bias lighting...

Thanks, L2W!

JMS
03-28-2010, 09:29 AM
And BTW it is called bias lighting...
"Providing a small amount of light behind the set 'biases' the iris (reducing the range of motion in the iris muscle), resulting in more relaxed viewing. Glare and reflections are then dramatically reduced, by eliminating any light source from striking the front of the set. Colors appear richer and blacks are darker. Contrast and brightness controls can be turned down."

What I fail to understand it the need for a 6500K source . . .unless the walls that will be reflecting the light are pure black or pure white, the light reaching your eyes will not be anywhere near 6500K; it could literally be anywhere in the spectrum depending on wall color.

For that reason, I don't buy CNET's claim that:
"the backlighting will provide just enough light for your eyes to get their color reference, and you'll find that pictures seem a little crisper and colors more vivid"
. . . it just doesn't pass the common sense test.
It makes sense that wall color and brightness will have an effect on the perceived color temperature of bias lighting.

"The SMPTE ideal recommends that the wall behind the set be a neutral color to further preserve correct color perception. Colors classified as neutral by the Munsell Color Order System, range from white to black throughout the gray scale. Vivid colors should be avoided if they are used within the field of view of the TV screen. SMPTE suggests Munsell's 'Nearly-Neutrals' be used elsewhere in the viewing environment, but not within the field of view while observing the screen. The typical off-whites used in most homes will skew the viewer's color perception only slightly. These lighter wall colors invariably reflect so much light that most users of Ideal-Lume require some degree of dimming."

http://www.cinemaquestinc.com/ideal_lume.htm

Scottnot
03-28-2010, 11:12 AM
It makes sense that wall color and brightness will have an effect on the perceived color temperature of bias lighting.
Right, so unless folks are willing to paint the walls an achromatic shade of gray there is no need to specify lighting with 6500K.

Just trying to save folks time, money and worry.

22ozCthulhu
03-28-2010, 11:47 AM
I just painted my living room walls a bluish-grey colour which I hope will be neutral enough for good bias lighting:

http://www.highdefforum.com/members/22ozcthulhu-albums-home-setup-picture346-32-sharp-lcd-going-back-into-bedroom-making-room-tc-p50g25-i-am-placing-here.jpg

This afternoon I plan on picking up a Panny TC-P50G25 for the living room. It'll be my first plasma ever. I'm GEEKED!! This 32" Sharp LCD from my bedroom is holding me over for now. It looks pretty sad doesn't it. Hahahaa

Scottnot
03-28-2010, 01:00 PM
I just painted my living room walls a bluish-grey colour which I hope will be neutral enough for good bias lighting:
That's exactly what "bluish-grey" means - the light your eyes see reflected off of a "bluish-grey" wall will appear "cooler" than if the walls were neutral . . . perhaps on the order of 7500K, even 9000K depending on how "bluish-grey" the "bluish-grey" actually is.

If you really believe that it is important that the "bias lighting" be the same color temperature as your television, then the best thing to do would be to use a calibration disk to put up a "white" screen on the TV and compare the color of the screen to the color of the wall using different tempurature lights until you get as close as you can.

And if you're really serious, I guess you could invest (several K$) in something like a Sencore Klein K-10 colorimeter and actually measure the color temperature of the light coming from your walls with different illuminants.

But really, for non "reference display environments" and for casual home viewing is it really worth all the fiddling?
You'll be tickled with the TC-P50G25 no matter what lighting you end up using.

JMS
03-28-2010, 02:48 PM
This 32" Sharp LCD from my bedroom is holding me over for now. It looks pretty sad doesn't it. Hahahaa
I'm going to make a prediction. That 50" will look mighty fine there, but in a few months you're going to kick yourself for not buying the 54".

There, I spoiled it for you. ;)

mschupp
03-29-2010, 07:47 AM
I'm going to make a prediction. That 50" will look mighty fine there, but in a few months you're going to kick yourself for not buying the 54".

There, I spoiled it for you. ;) In my experience they "shrink" in a couple of weeks, not a few months.

I should'a got the 70 inch...........

22ozCthulhu
03-29-2010, 09:30 AM
I'm going to make a prediction. That 50" will look mighty fine there, but in a few months you're going to kick yourself for not buying the 54".

There, I spoiled it for you. ;)

Hahaha! I hope I don't feel that way later. Right now, I think the size is perfect. Now if I can just find a way to muffle the buzzzzzing, I'll be a happy camper. :eek:

dsskid
03-29-2010, 09:30 AM
I have a 58" and wish I had gotten the 65"

Loves2Watch
03-29-2010, 12:29 PM
I have a 58" and wish I had gotten the 65"

I kept upgrading in size until I finally got the 85", now I'm satisfied for the most part and if not I can always drop the screen and watch the projector on a 120" screen.

22ozCthulhu
03-30-2010, 08:36 AM
..But really, for non "reference display environments" and for casual home viewing is it really worth all the fiddling?
You'll be tickled with the TC-P50G25 no matter what lighting you end up using.

Oh I am tickled. :banana:

But the fiddling is just that.. only fiddling. I like the look of the bias lighting behind the TVs that I've seen in pictures, so I wanted to create that effect for the livingroom. ;)

JMS
03-30-2010, 08:49 AM
Hahaha! I hope I don't feel that way later. Right now, I think the size is perfect. Now if I can just find a way to muffle the buzzzzzing, I'll be a happy camper. :eek:
I helped set up my sister-in-law's 50S1 a few weeks ago. Neither she nor I have noticed any buzzing. How loud is it?

JMS
03-30-2010, 08:54 AM
Sorry, I see you're discussing that in your other thread.

cdcrowell
03-30-2010, 07:13 PM
i use ikea dioder behind mine.i know its not the proper lighting but i like it.you can change the colors to your mood:D

http://i24.photobucket.com/albums/c26/cdcrowell/DSCN0552.jpg

http://i24.photobucket.com/albums/c26/cdcrowell/DSCN0023.jpg

http://i24.photobucket.com/albums/c26/cdcrowell/DSCN0553.jpg

22ozCthulhu
04-02-2010, 02:05 PM
i use ikea dioder behind mine.i know its not the proper lighting but i like it.you can change the colors to your mood:D

@cdcrowell

Thanks for posting these pics of your bias lighting. I like the effect that you've got going with your TV, very nice!:D

I will start looking into ikea dioder, thanks!

:)

shoelace
04-02-2010, 02:31 PM
I've worked with lighting for almost 20 years. While I wont get into any kelvin temp or CRI arguments, I would like to offer up a cheap solution to those who are on a budget like myself.

I found (In Walgreens) a Feit (pronounced Fight) brand LED night light in a 6500k temp for about 7 bux. If you have a socket anywhere behind your tv (in my case I have one directly behind mine) you can simply plug it in and forget about it.

Below is a link containing their night lights. They even have a stick on one for those who do not have a socket to plug into.

http://feit.com/feit_eternalite_02.html

Scottnot
04-02-2010, 05:47 PM
Below is a link containing their night lights. They even have a stick on one for those who do not have a socket to plug into.
The following page and chart should be of interest and helpful to those wondering what "color temperature" is all about.

http://feit.com/feitcolortemperature.html

22ozCthulhu
04-02-2010, 08:04 PM
..Below is a link containing their night lights. They even have a stick on one for those who do not have a socket to plug into.
http://feit.com/feit_eternalite_02.html

Thanks for this info, showlace. This helps me a lot! :yippee: