Lightsource for DIY LCD Projector 34
xpndsprt asks: "I'm trying to develop my own projector (i've been reading DIYAudio forums for a while and finaly decided to put together my own), but it seems that people are having problems with light source. The Slashdot crowd seems to always have interesting answers to problems at hand, so to get to the point: Does anyone know of a powerful lightsource (200w+) which would produce a high temperature light (5000K+) and would not heat up too much (ppl seem to be using mag.Hylide bulbs, but those seem to heat up tempreture in the room by about 10F. Xenon lights are out of question, since too hot and not bright or white enough. If someone could help, it would be greatly appreciated."
A few [cheapass] ideas... (Score:3, Insightful)
White LED's? lots of them. Probly not so cheap though.
Some old scanner bulbs? If you look in the right places you might be able to grab a few. AFAIK they are pretty cold.
Theft. Find a suitable projector light source at work, disconnect it inside the case. Complain that it's broken, get a replacement, reconnect the wire, pocket the brand new bulb :) Repeat as necessary.
Ali
Photographic Enlarger (Score:2, Insightful)
Think Lumens, not Watts (Score:3, Insightful)
The mount of light that is output by a light source is measured in lumens, not watts. Other posters have mentioned that all light eventually gets converted into heat, but some light sources are more efficient than others when it comes to how much actual light they produce for a given unit of energy consumed (think watts). You need to identify how much light you need (in lumens), and then find a light source with a low lumens/watts ratio that produces enough light at the right spectrum to satisfy your application.