richardc1983 Posted October 24, 2007 Author Share Posted October 24, 2007 I would say the discharge lamps gets way hotter than the halogen lamps. Link to comment Share on other sites More sharing options...
Tomo Posted October 25, 2007 Share Posted October 25, 2007 I would say the discharge lamps gets way hotter than the halogen lamps.No they don't. A 250W halogen lamp dissipates 250W.A 150W discharge lamp dissipates 150W. However, the discharge lamp emits energy in different directions and at different wavelengths to the halogen.This is an important difference. Link to comment Share on other sites More sharing options...
KevinE Posted October 25, 2007 Share Posted October 25, 2007 The discharge lamps do start to convert more of their input energy to heat and less to light as they get older, sometimes a duff lamp will trip the overtemp stat and I've even known them to deform the casing of certain moving heads..however I would say a new halogen probably generates rather more heat than even a duff discharge when we're talking 250W H vs. 150W D. I think the argument ought to be more about light-efficiency than energy used, look at the tables of energy vs light vs heat output fot the respective types. For information we are talking Metal Halide lamps for disco scanners. http://www.venturelighting.com/images/LumensperWatt-barchrt.gif Link to comment Share on other sites More sharing options...
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