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Article #292Re: Best way to power array of LEDs?
From: Keith Wootten
Date: Fri, 04 Oct 2002 18:51
Date: Fri, 04 Oct 2002 18:51
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In message <ankkbu$lv9i$1@hades.csu.net>, Lizard Blizzard <NOSPAM@rsccd.org> writes <snip> >Using a lamp to serve as a more or less constant current 'ballast' is a >good idea, but if it is run at anywhere near normal brightness, the >lamp's lifetime will be short in relation to the LEDs. And of course >when the lamp goes open, the LEDs no longer get current. So it would >be much wiser to use it at much lower than normal brightness so that >the lifetime is extended considerably, comparable to the LEDs. Yep, the lamp should run orange at its 'normal' operating point. This way it will last more or less for ever - I think it's a twelfth power or thereabouts? Cheers -- Keith Wootten
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