"However, do not blow cool air directly over the lamps, as bulb cooling will result in inefficient evaporation inside the arc tube and abnormal spectral variations of the bulb will result. It is important to remember that these bulbs are designed to operate at a pre-determined temperature."
I read this on the net, is it true? So how should I ventilate the bulb? From above drawing air out? Any body have sugestions on ventalation. Its a 150watt MH...
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I read this on the net, is it true? So how should I ventilate the bulb? From above drawing air out? Any body have sugestions on ventalation. Its a 150watt MH...
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One more thing
If I make a reflector like this parabolic one for a fish tank will it be O.K.? Because someone said about the light hitting the bulb and it overheating? THis is basically 5 pieces of mirror and flat shaped I guess we wont curved the whole way around 50% bulb?
If I make a reflector like this parabolic one for a fish tank will it be O.K.? Because someone said about the light hitting the bulb and it overheating? THis is basically 5 pieces of mirror and flat shaped I guess we wont curved the whole way around 50% bulb?
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Ok, first off, I haven't made a projector (yet), so you can take this with a grain of salt if you wish.
However, I refer to an old slide projector that we have. It uses a squirrel fan to pull air out of the case. Hope this helps!
However, I refer to an old slide projector that we have. It uses a squirrel fan to pull air out of the case. Hope this helps!
Hi Tinker,
Don't worry about reflected light from such an arrangement killing your bulb.
It would only be a problem if your bulb were at the center of a spherical reflector with a HIGH percentage of reflected light (anything above 25% ish) being directed straight back into the bulb.
Bill.
Don't worry about reflected light from such an arrangement killing your bulb.
It would only be a problem if your bulb were at the center of a spherical reflector with a HIGH percentage of reflected light (anything above 25% ish) being directed straight back into the bulb.
Bill.
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