... centigrade7.Life span: >50,000 h8.Full range of colors: cool white, white, warm white, blue, green, red, yellow9. Aluminum housing ... the expect lumens,without swift loss.5.Low lumen attenuation: High quality constant current driver and good heat dissipation techniques3.Caption1) Please ... before connect the product, then turn on. 3) Don’t touch the metal parts of the bulb, while power is on ...