White power LED achieves 200 lumen per watt
Posted: Thu 25 Feb 2010 14:57
White power LED achieves 200 lumen per watt
This snippet is from the e-newsletter of Elektor magazine. http://elektor.com Fri, 19 Feb 2010.
Cree, Inc. announces another industry-best reported efficacy record of 208 lumens per watt for a white power LED. Cree’s tests confirmed that the LED produced 208 lumens of light output and achieved 208 lumens per watt efficacy at a correlated color temperature of 4579 K. The tests were conducted under standard LED test conditions at a drive...
Read more http://dbaseserver.mistermail.nl/t/7677 ... /194635/0/
To put this in context, a 4W 'Oldham' style caplamp would probably produce around 40 lumens at around 10 lm/W. So if you are happy with a 40 lumen light source, this new LED would draw around 200 mW and so a single recharegable AA NiMH 'hybrid' cell (2100 mAh) would last around 12 hours.
.
This snippet is from the e-newsletter of Elektor magazine. http://elektor.com Fri, 19 Feb 2010.
Cree, Inc. announces another industry-best reported efficacy record of 208 lumens per watt for a white power LED. Cree’s tests confirmed that the LED produced 208 lumens of light output and achieved 208 lumens per watt efficacy at a correlated color temperature of 4579 K. The tests were conducted under standard LED test conditions at a drive...
Read more http://dbaseserver.mistermail.nl/t/7677 ... /194635/0/
To put this in context, a 4W 'Oldham' style caplamp would probably produce around 40 lumens at around 10 lm/W. So if you are happy with a 40 lumen light source, this new LED would draw around 200 mW and so a single recharegable AA NiMH 'hybrid' cell (2100 mAh) would last around 12 hours.
.