Fluorescent tubes in general are very efficient in terms of lumens per watt, but their lifetime is very low and this makes them more costly to maintain. LEDs are efficient and have a long lifetime, up to 50,000 hours if they are driven well with appropriate heatsinking.
With a new technology dubbed nPola, Seoul Semiconductor claims it has achieved a breakthrough in LED lighting: nPola LEDs produce 5 times more light that standard LEDs with the same surface. What's more, Seoul sees the potential for a further tenfold light intensity increase.
At the opportunity of its annual meeting, carmaker Audi presented what it calls a look into its future. One of the next innovations customers can expect from Audi is exterior illumination based on OLED technology.
Somewhat surprisingly, the UK is leading the energy efficiency ranking of the world's twelve largest economies, according to the International Energy Efficiency Scorecard by the American Council for an Energy-Efficient Economy (ACEEE).
BASF and Philips claim they have announced a breakthrough in material research aiming at the development of transparent OLEDs. The companies regard sun roofs for cars as a possible application market.
A dimmable, high efficiency, high power factor, primary side regulated flyback for LED Lighting applications
In lighting applications high overall efficiency and power factor correction (PFC) are very important features, not only at higher power levels. Apart from that a ballast design should have good EMI behavior and low cost. This article describes a high power factor flyback converter for LED lighting that implements all these features and can be dimmed with an standard TRIAC based dimmer.