Cree Announces That It Has Broken 200 Lumen Per Watt Efficacy Barrier
Cree, Inc. recently announced a new 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 4579K. The tests were conducted under standard LED test conditions at a drive current of 350 mA at room temperature.
Once again, a breathless press release about a new record lumen per watt achievement. So how long (a thousandth of a second?) was this achieved? Did they use a driver? What will this LED achieve in a real luminaire with a real driver in a real temperature? I am sorry but it is as important in these press releases for what they do NOT tell you as to what they do tell you.