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MazdaMatt · 12-10-2008, 08:21 AM

Rather than strings of four, you ought to find out how much voltage drop there is across the LED and use the largest number possible while staying under your source voltage. ie, if they are 2V and you have a 12V supply, use 5, if they are 1.6, use 7 of them. This gives you the best efficiency out of the circuit.

12-10-2008, 08:21 AM	#39 (permalink)
MazdaMatt Master EcoModder Join Date: Jun 2008 Location: London, Ontario Posts: 1,096 2k2Prot5 - '02 Mazda Protege5 90 day: 33.82 mpg (US) Thanks: 0 Thanked 17 Times in 14 Posts	Rather than strings of four, you ought to find out how much voltage drop there is across the LED and use the largest number possible while staying under your source voltage. ie, if they are 2V and you have a 12V supply, use 5, if they are 1.6, use 7 of them. This gives you the best efficiency out of the circuit.