Isn't Forward Voltage normally specified at nominal current? If you're using a much lower current, the voltage won't be anywhere near Forward Voltage. They are usually blue LEDs. I've certainly seen modern LEDs willing to emit light at very low currents like that. --=20 James Cameron http://quozl.netrek.org/ --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .