... 21st century, compared with traditional light sources, it has unparalleled advantages:1. High purity, bright and rich colors;2. Super ... no mercury, no UV in the light source;4. Solid light,good seismic performance, solid and reliable;5. Energy, economy, maintenance ... brightness, three-color combinations of LED can be used to changes colors freely with PWM. 2012 Long life span high power led(HMD30W)