![]() 470 nm blue needs 0.016 µmols to generate 1 lux. A 12.4 µmols of photons are required to get 1 lux from a 400 nm LED. A 400 nm purple LED would need 773 times more photons than a 470 nm blue LED to achieve the same luminous intensity. Purple is very difficult to get luminosity. The Cree 11,000 mcd blue LED will work much better than a 2,200 mcd purple. Less current also gives you a lower forward voltage. This means you get more light with less current. ![]() Use current mirror transistors to balance rather than resistors: Current distribution in parallel LED stringsįirst off you need to use LEDs with a very high luminous intensity. Pay attention to your LED forward voltages. ![]() Use only 2V red, yellow, and orange LEDs.Ģ NiMH batteries in series may work better. You should not need more than a few mA if you use high luminous intensity LEDs. You are expecting too much out of the QX5252, an NiMH battery, and a little solar cell.
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