[mikethedruid]

The colored, transparent plastic sheets used to cover theater and stage lighting are known as "gels." They are heat resistant. I recommend using INCANDESCENT lighting with them despite the heat produced. This is why one uses specially designed lamps for stage lighting, to minimize the heat problem. The reason for using incandescent lamps with gels is that LED lights give off only 3 very narrow light frequencies of red, green, and blue if they are made to imitate incandescent lights, whereas incandescent lights give of a complete spectrum through the visible light range and beyond, both above and below. This is why one must be very careful using LED bulbs to replace the tail light bulbs in cars designed for incandescent tail light bulbs. Only the red produced by the LED bulb will pass through, the green and blue will be filtered out, and the red produced by the LED may not be the same frequency as the red passed by the tail light lens, and so will appear quite a bit dimmer than the original bulb. The same is true using gels with LED bulbs.