Date: Tue, 06 Jan 2004 08:35:49 -0800 From: Wright Huntley <whuntley at verizon_net> Subject: [APD] Re: LED lighting update To: Aquatic Plants Digest <aquatic-plants at actwin_com>
Some folks get high on the damndest substances! :-) [BTDTBTWW!]LOL yes... Yes I do :) what the heck does btdtbtww mean?
OK, so our new rule of thumb is 16 LEDs per 2G or 8 LEDs/G? :^) [A 55G tank could get mighty expensive!]
Nothing says you can't immerse the ends of the plastic lenses in the tank water. That should give a big spread, and increase efficiency a bit in the process.
One question: How much total power are you using, and what percentage of that is being dissipated in the resistors? The resistive heat and power could probably be saved with a simple switching, current-regulated supply. I have a hunch that one of the real benefits of LEDs is that the efficiency could eventually be higher than incandescent and that those of us with warm summers might like the "cooler" lamps. That will probably never happen with resistors as ballast (voltage-to-current converters), and voltage-regulated power sources.
[Almost as silly as buying 800psi CO2 when what we need is usually less than 1 psi!]
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