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killernoodle writes:I'm using an ED-28 lamp that has yet to come in the mail. It is a pulse start too, so it is better than a regular MH. So far, many projectors have been built and none of them have lamp overheating problems. If you look at the first page, you will see that i have already taken care of the cooling situation
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So the cooltube is a nogo. Pulse start is good. Better color rendering and faster starting.
I can't tell from the picture-is it an open fixture lamp? How are you coming on the box to mount it in?
I'm looking forward to the rest of your build. I think the cooling will be a challenge if you're going for quiet operation. Youll be moving something like 450 watts of heat out of approximately a 27 liter box, about the size of a mid tower computer case.
The reflector is still bothering me, so it's time for an experiment. I gathered a 150W metal halide lamp and ballast, a parabolic reflector, a sheet of white plastic, and the only spherical reflector I have-a dog bowl. Just need to borrow a light meter from work tomorrow. I'd like to see which reflector generates the most light on a 15" x 15" square.