RE: [APD] Lighting a nano with a 5300K halogen -- or - Colin it likeit is

["william ruyle" <inquartata at comcast_net>]

Hummm, so Scott, to distill this down: halogens are super
awesome wicked bad lights for tanks, correct?:-)

Bill

-----Original Message-----
From: aquatic-plants-bounces+inquartata=comcast_net at actwin.com
[mailto:aquatic-plants-bounces+inquartata=comcast_net at actwin.com]On
Behalf Of S. Hieber
Sent: Thursday, September 09, 2004 7:00 AM
To: aquatic plants digest
Subject: Re: [APD] Lighting a nano with a 5300K halogen -- or - Colin it
likeit is


Just in case anyone missed the point, *any* bulb the uses
electricity through a filament as the light source, is a
very efficient heater but a terrbily horribly awfully
really no good very inefficient method of illumination --
about 95% or more of the input energy is given off as heat!

Bulbs that use an arc of electricity (fluorescents and HID
or metal metal halides, etc.) only give off abut 60%-to
70-% of their input energy as heat. A really tremendous
gigantic superior very efficient method of illumination.
There are even some arc bulbs that give off only about 20%
of their input energy as heat but they cost a small fortune
and the light emitted is in such a narrow tiny eeky
yellowish part of the spectrum, that they suck even in
parking lot lamps.

Scott H.
--- Bill Wichers <billw at waveform_net> wrote:
> . . .  HALOGEN lights ARE NOT METAL
> HALIDE (MH)
> lights. Much emphasis there with all those caps...

=====
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