<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by Gandalf:
Pardon my ignorance, but what is the light output, and 'beam angle' of a 3MM Nichia LED, compared to the more commonly used 5MM Nichia 20 degree, 5600 mcds LEDs? What I'm getting at is if you were to 'convert' the output of 44 3MM Nichias, to the same output from 5mm Nichias, how many of them would be needed to equal the light output of the 44 smaller LED's?<HR></BLOCKQUOTE>
I've been told by another well-informed CPFer the 5mm and 3mm nichias use the same dies. So, they're basically the same animals in different packages and maybe binned differently too. Since the 3mms use less epoxy (which means less to yellow and blot out light over time), the 3mms seem like a good idea in at least one way. nichia 3mms typically have a much wider beam angle. From the samples that I have, the 3mms have nearly identical actual drive characteristics as the 5mms (ie. same power going in = same amount of light coming out).