Consumer Technology

Published on April 18th, 2013 | by Nicholas Brown


Most Efficient White LED Lamp Developed By Philips

April 18th, 2013 by  

Philips, the well known electronics manufacturer, has created an LED Lamp that is so impressively efficient that it produce 200 lumens of light for every watt of power it consumes.

Coen Liedenbaum, Innovation Area Manager Lighting for Philips Research, with the prototype 200 lumens per watt tube LED in the lab, now the world's most efficient LED lighting on a system, "real world" level that does not compromise on light quality.  (PRNewsFoto/Royal Philips Electronics)

Coen Liedenbaum, Innovation Area Manager Lighting for Philips Research, with the prototype 200 lumens per watt tube LED in the lab. (PRNewsFoto/Royal Philips Electronics)

The efficiency of LED lamps currently on the market ranges from 45 lumens per watt to 90 lumens per watt. This Philips lamp, a TLED prototype, blows those numbers out of the water. The T here means tube, by the way.

This TLED emits warm white light (as incandescent light bulbs do). I know that many people have become accustomed to the cool white that most fluorescent bulbs produce, but if you still want that warm, flattering, incandescent glow, you can still get it.

An efficiency of 200 lumens per watt means that a 4 watt version of this lamp could adequately light a 100–200 square-foot room with 800 lumens (the brightness of a 75 watt incandescent bulb).

Beware Of Low-Quality LEDs

While the story of the day is clearly the high efficiency of this new Philips lamp, I think this is an opportunity to make you wary of low-quality LED products on the market.

Most LEDs on the market are in the 40-50 lumens per watt range (even if they are from known brands). Do not buy these, as they use more electricity than compact fluorescent light (CFL) bulbs, which are 50-75 lumens per watt, and they still cost far more money up front — so it isn’t a case where you get what you pay for.

The process of determining efficiency is very simple for all types of light bulbs: Divide the brightness in lumens by the wattage of the bulb. For example: 450 lumens divided by 9 watts = 50 lumens per watt. Using this method, you can easily compare the efficiency of various bulbs, and then see how that compares to their price.

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About the Author

writes on CleanTechnica, Gas2, Kleef&Co, and Green Building Elements. He has a keen interest in physics-intensive topics such as electricity generation, refrigeration and air conditioning technology, energy storage, and geography. His website is:

  • Victor Brodt

    260 Lumen per watt is even a better by 30% that is a unit already on the market! cf VictorBrodt brodtstuff atsign

  • I would definitely buy LEDs even if they are “only” as efficient as CFLs.

    LED bulbs have a lot of advantages over CFLs (instant switch to high performance, less prone to lower temperatures…etc).

    Another factor is that the CFL I have seen so far have NEVER reached their promised lifetimes (not even close, even quality ones) while I have very-very few LED failures (those are usually soon after putting them to work so well within the guarantee period – low-quality electronics inside).

  • EcoFerris

    Will we need new fixtures for that tube or will they fit into an old school florescent fixture?

  • dynamo.joe

    Impressive performance, but why a tube?

    • zoing

      So they can replace existing office tubes.

  • Since my house is full of CFLs already, I can wait some years before LEDs get cheaper, more reliable, and more efficient.

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