... 3,000 hours ,high efficient to save the energy,little light damage,Circuits using LED constant-current source,morestable quality, more ... .2.Please turn off the power switch filmed.3.Tuned block neutral-density adjustable illumination Angle. 1.With high voltage, non ... or force majeure cause damage,can not repair.3.The light must be grounding to ensure safety,avoid by all means ...