EPISTAR Achieves 110lm/W Warm White LED for 1W and 3W Operation

Epistars approach enables improvement of these two merits simultaneously.

The 1W package has the CRI of 90 and efficacy up to 110lm/W for lower voltage (15V) operation while the 3W package has the CRI of 90 and efficacy up to 105lm/W for higher voltage (50V) operation. Both these packages have the CCT of around 3000K. The 1W lamp combined several Epistars blue and red LED chips in the same package, coated with yellow/green phosphor. The LED power consumption and total lumens can be adjusted by modifying the combinations of the LED chips. The 3W lamp used one high-voltage monolithically integrated DC multiple-chip array combined with several Epistars red LED chips. Yellow-green phosphors were used in both 1W and 3W packages. A bridge structure can be used with the 3W lamp to achieve the AC drive. These packages can be used in the E12/E14 candle light, E26/E27/GU10 light bulbs, led work light or led off-road light bars and other applications for high efficacy warm white.