Re: Aquatic Plants Digest V1 #65

>From: Earle Hamilton <ehami at sunny_ncmc.cc.mi.us>
>Date: Sat, 11 Nov 1995 16:47:02 -0500 (EST)
>Subject: Halogen lights
>I suspect the subject has been brought up before so I will apologize in 
>advance for replowing old ground but while we are talking about light 
>sources, what about halogen lights?  They can be dimmed, cost very little 
>and are a very very concentrated source of light.  The main down side I 
>can think of is heat and I have no idea what the lumens/watt numbers are.
>At any rate, Ace hardware just had a sale where you could get a 500 watt 
>unit that looks a little like an oversized auto heatdlight for under ten 
>bucks.  Any comments on halogen lights would be appreciated.

I think halogen lights are basically like intense incandescent.  As for 
lumens per watt, I don't have a light meter but I do know in my house I have 
200 watts of halogen lighting in one room and it does not seem as bright to 
me as the room next to it with 80 watts of fluorescent.

I think you would be dealing with a very hot, inefficient lights that have a 
poor spectrum.  There is something at one of the web sights that think 
basically says the same thing.