Citizen Develops 540 lm White LED for Illumination

The newly developed “CL-L102-C7 Series” is an expansion of the existing CL-L102-C3 Series, and inherits the metal core base package, which is an excellent radiator. Without altering the dimensions of the product, we have succeeded in more than doubling the luminous flux.

In terms of performance as a general light source, this new product provides more luminous flux with just one LED lamp than the widely used 40 W incandescent light bulb or the light bulb-shaped 8 W fluorescent tube, which is becoming a common alternative to the 40 W bulb (total luminous flux of both: 485 lm). The new product contains no infrared (heat) or ultraviolet radiation within its spectral output, making it suitable for installation in places where the use of incandescent or fluorescent light sources is not an option. For applications such as solar battery systems, where priority is placed on luminous efficiency, our new product can be used with a lowered input current to obtain a luminous flux of 150 lm at an efficiency of 110 lm/W.

Citizen product managers are convinced that this product, which can provide luminous flux on a par with widely used general lighting sources at a high luminous efficiency, in an extremely thin package, and with the LED’s long life, will open up new possibilities in the development of lighting applications. Citizen Electronics will continue to strive for further enhancement of luminous flux and luminous efficiency, as well as continuous development of LED lamps that combine these two attributes to help popularize the use of LED lighting.

Citizen will also mass-produce a 2900K color temperature type as a standard product. Samples of the new product are expected to be available in October 2007. Shipment of volume production is scheduled for January 2008.

Comparison of new product with existing LED light source:

Changes in properties according to input current: