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LEDs Will Get Even More Efficient: Cree Passes 300 Lumens Per Watt

LED maker Cree announced this week that it had achieved a new record in terms of lighting efficiency, harvesting 303 lumens per watt from a white high power LED at room temperature.  This represents a 10% increase over last year’s record of 276 lumens per watt, also held by Cree.

For comparison’s sake (though admittedly not a pefect example), the traditional 60 watt incandescent bulb (now essentially outlawed as a consequence of new lighting standards that took effect in January, and which utilized 95% of its energy to produce heat), typically yielded 750-1150 lumens, or between 12.5 and just over 19 lumens per watt. The warm white LED from Cree that you can currently buy at Home Depot in some markets for as little as $5 (with utility subsidy included in the shelf price) yields 800 lumens for 9.5 watts, or 84 lumens per watt.

Forbes

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