Re: [APD] replacement for metal halide lamp

["Louis Lin" <lhclin at tickquest_com>]

They are different technologies and you cannot substitute one
for another.

Halogen does not give out a lot of light for the same wattage.
90% of the energy is wasted as heat.  For the similar wattage, 
consider using fluorescence.
-----------------
Louis Lin
TickQuest Inc    www.tickquest.com


----- Original Message ----- 
From: "ktlau" <ktlau at netvigator_com>
To: <aquatic-plants at actwin_com>
Sent: Tuesday, February 03, 2004 8:44 PM
Subject: [APD] replacement for metal halide lamp


> Can anyone tell me the difference between a metal halide lamp and normal
> halogen lamp (those 35W small bulbs)?
> Metal halide lamps are expensive and generate a lot of heat. I wonder if
> halogen can be a close substitute. They also give out a lot of light
> (albeit the spectral density will be different), and consume less space.
> 
> Tony Lau
> 
> 
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