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Forward Voltage: 3.6V typ. 4.0V max @ 20mAThats your voltage drop...
Okay, so let me make sure I understand this correctly. The supply voltage will be 5V and the led will consume 3.6 to 4V at 20ma before it blows. So I make sure to get a resistor that can handle about 70 ohms +- 50% to keep the led from blowing.Is that correct?