... Cool white, warm white, white, red, blue, green and yellow4. Led light source: TW Epistar5. Luminous flux: 70-80 lumens/watt ... grade)7. Superior thermal technology with internal copper heat conductor and external aluminumhousing8. Brightness degradation: 3% - 5%1kh9. ... in store, display window, hotels, house, exhibition halls, and other local decorative lighting projects. E27 21leds 5050 SMD led light