Philips’ 200 lumens-per-watt prototype LED lamp is the world’s most efficient

GPS · Apr 12, 2013

Progress in the LED lighting industry can best be measured in two separate metrics: pricing and efficiency. Pricing gets most of the attention, but so many factors affect it — from the cost of materials to various subsidies — that it is primarily interesting as an overall trend. Efficiency, which is measured in terms of lumens-per-watt, is a better way to look at progress. It too depends on multiple factors (including the price of more expensive components) but the industry’s steady increase in lumens-per-watt (lpw) is a less adulterated indicator of advances in technology and design.

In keeping with these advances, today Philips announced that they have created the world’s most efficient warm white LED lamp. The prototype operates at 200 lumens-per-watt, a number that is more than double what is found in typical household LED products. The “warm white” part might seem like a minor detail, but it’s actually rather important. The majority of people prefer their indoor lighting to be at warm white, usually 2700K, so gaining efficiency at this color temperature matters. Raising the color temperature is an easy way to increase efficiency (less color shift is necessary), so hitting 200 lpw with a 5000K lamp would be less of an accomplishment.

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Source (ExtremeTech):
http://www.extremetech.com/electronics/153123-philips-200-lumens-per-watt-prototype-led-lamp-is-the-worlds-most-efficient

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