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Re: [APD] LED Lighting

no...the resistors would not be redundant. and for lighting a tank with leds
at other than "moonlight" levels a switchmode current source would be
preferred which definitely means a transistor(s).

i wonder how practical this actually is however since the leds i'm aware of
are a few milliwatts output. even at 50mw that's 20 required per watt. so
for 20 watts you'd need 400 leds.

seems pricey...

good luck


----- Original Message ----- 
From: "S. Hieber" <shieber at yahoo_com>
To: "aquatic plants digest" <aquatic-plants at actwin_com>
Sent: Monday, December 29, 2003 4:14 PM
Subject: Re: [APD] LED Lighting

Wright do you really think transistors are needed in a
power supply? Low voltage DC, a rectifier and some
resistors ought to do the job. But with enough to light a
tank, even the resistors would be redundant, no?

Scott H.

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