... 3 years 3, lifespan: 50000 hours T5 8w/14w/21w/28w fluorescent lamp ItemT5materialaluminumlight colourRGBSwitchwith switchpower8w/14w/21w/28wwirecopper 0.32MM2warranty1-3 ... External constant current driver stable permance4, instant on, no warm up time.ApplicationLed ceiling light are widely ... standard warranty.2, All the shape, size, color, brightness is available here.3, Price is much more flexible ...