Ok i thought os this while dissasembling an lcd
The plastic backing is a light evener/smoother with the 3 thin pieces of silver paper
Heres my gustion will useing that as a light smoother/ heat sheald (sense we need one anyway) in order to be able to use multiple light sources
The only difficulty i see is that it absorbs 35 to 50 pecent of the light passing through it so youed need at least twice the light for compensation.
however the ability of multiple light sources can easaly compensate and give guiet a bit more off
my small scale test have conformed in my mind it work's

I think that the best part is
a.it already comes with a moniter or any pre assembled lcd and
b. is can be an easy slide in replacement for your heat sheald that allows you to use multiple bulbs!

any guestions or comments would be apprecated

Thank's
Sorcerer of Dark

Before we go off the handle and tell dilligaf1 multiple lamps won't work, I just wanted to say that dilligaf1's already been advised.

Here's some further reading about that diffuser you're thinking of using.
Google: site:lumenlab.com diffuser

Well... Multiple lamps WILL work. They just won't work well. (Isn't this in the FAQ? If not, maybe I'll add it, because it HAS been asked frequently.)

Here's why:

The whole point of a projector is to project an image onto the screen. In order to do that, we need as much light as possible to get from the LCD and to the projection lens. More light through the LCD is only helpful if it goes through that lens.

So if you diffuse the light, you are, in effect scattering it so that it covers more of the 180 degrees (Or, more technically, the viewing angle of the LCD)

Let's say that you have a standard triplet, and it's some 360mm away from the LCD. The area that the light will now cover is (for ease of calculation) 180 degrees. The formula for area of a sphere is 4/3*pi*r*r where r is 360mm

This is about 542,867 square milimeters.

The area of a standard triplet is a circle about 63mm in diameter. It has an area of about 3,117 square milimeters.

This means that you will only project 0.57 percent of the light that gets through the LCD. I think that's a pretty poor return on investment.

By comparison, with a single light source and well aligned fresnel lenses, even a mediocre build can project over 60% of the light that goes through the LCD. (I think that many, if not most builds perform better than this, however it's not uncommon for someone to be able to DOUBLE their lumen output from initial build to a fully tweaked build, which suggests that they were initially projecting less than half of the total light available.)