Diode forward voltage

If you have good specs from your supplier, you'll want to enter the typical forward voltage here. Ideally you'll have something that looks like "3.4V @ 20 mA" which defines forward voltage and current at one point on the operating curve. If you don't have good specs, here's a table to help you make decent guesses:
colorvoltage (Volts)
IR1.5
red2.0
orange2.0
yellow2.1
green2.2
true green3.3
blue3.3
white3.3
UV3.3
blue (430 nm)4.6


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