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Politics : Politics of Energy -- Ignore unavailable to you. Want to Upgrade?

To: teevee who wrote (26940)	7/10/2011 5:21:53 PM
From: Eric	Respond to of 86355

90% efficient? I was at a party just last Friday night here in the Seattle area and had a long discussion with one of my friends who does research and engineering with LED's. He is an EE and optical engineer and works pretty exclusively with LED's. We had a long discussion about LED efficiency and he said the "state of the art" for blue LED's is slightly above 40%. No LED currently exceeds 50% in efficiency. I've worked with LED's since the early 1970's and we have a long way to go to get to 90% efficiency. Currently it's impossible. If we are lucky maybe the mid 60's in a number of years.