On Earth Day, Philips will release a $50 LED bulb that is the most energy efficient LED bulb in the 60-watt equivalent category.
This comparison shows the Philips L Prize LED light on the left and Philips AmbientLED on the right. Both are 60-watt equivalents, but the L Prize LED gives off more light with 940 lumens compared to 806 lumens. The light quality is significantly better, too, with the L Prize rated at 93 CRI and the AmbientLED at 80. In terms of power consumption, the L Prize consumes 9.7 watts compared with 12.5 watts for the AmbientLED. Both bulbs give off light in all directions. (The light from this photo is from a table lamp above the pillow.)
In terms of design, Philips is using the same general approach for its latest LED bulbs for general lighting. The yellow/orange plastic on the outside acts as the phosphor to convert the blue light from the LED chips into a more pleasing and familiar yellow light. The light temperature for both bulbs is 2,700 Kelvin, similar to an incandescent bulb. The metal near the base acts as a heat sink, which is important to ensuring the long life of LEDs.