1.  4pcs high efficiency LEDs; 
2.  Rated Luminous Flux: 640lm/530lm; 
3.  Viewing Angle: 65~80 degree; 
4.  Color Temperature:5500K±200K/3500K-300K; 
5.  Central Light Intensity: 400cd/360cd; 
6.  Color Render Index:   ＞70; 
7.  Work Temperature: -20℃ ~ +50℃.