Through sample test, a conclusion is made that the lumen attenuation doesn't exceed 5% in continuous use for more than 1200 hours and the temperature difference between inside and outside doesn't exceed 10 degrees centigrade. Our product is in the fashion. It's the best choice of the lighting source at present. Product Features 1. Green energy-saving light source 2. Protection rank, above IP65 3. Excellent heat conductivity and radiation 4. Long service life, over 50 thousand hours 5. Applying to factories to develop various new-type lamps 6. With its own matched LED power source 7. Adopting nanometer brightening technique 8. Using all metal packaging structure 9. Using over 170 viewing angle