I think LED manufacturers have a harder time with the optics in SMT LEDs when compared to through hole. The through hole devices are typically much larger leaving more room for curved plastic and reflectors under the die. Harold --=20 FCC Rules Updated Daily at http://www.hallikainen.com - Advertising opportunities available! Not sent from an iPhone. --=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 .