Matt Sandstrom Posted July 17, 2007 Share Posted July 17, 2007 i'm sure you guys know this but i'll mention it for reference. led's are, as the name suggests, diodes, and thus have an almost constant voltage over them, always, no matter how much you add. the light it emits is proportional to the *current* you send through them, determined by the "spare voltage" on the circuit and the resistance of the same. to build an efficient led panel i think you need a led driver circuit, or there will be plenty of heat loss due to the necessary overhead on voltage. /matt Link to comment Share on other sites More sharing options...
Mitch Gross Posted July 17, 2007 Share Posted July 17, 2007 Those LEDs are very tightly packed. Be sure to address heat disburtion issues. Link to comment Share on other sites More sharing options...
Premium Member Phil Rhodes Posted July 17, 2007 Premium Member Share Posted July 17, 2007 Hi, The problem with heatsinking LEDs is that they tend to conduct most of it back down the pins; if you're using a conventional PCB, that's bad news. You really want at least one of the pins soldered very securely to a large chunk of metal. Phil Link to comment Share on other sites More sharing options...
Robert Hughes Posted July 17, 2007 Share Posted July 17, 2007 As for color temperature, why not intersperse some red, yellow or green LED's in the array, perhaps on seperate controller circuits so you can dial color temp in onsite? Link to comment Share on other sites More sharing options...
Premium Member Phil Rhodes Posted July 17, 2007 Premium Member Share Posted July 17, 2007 Because then you get strange spikes in the output spectrum and very low CRI. Phil Link to comment Share on other sites More sharing options...
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