... up to 95% 3.Good heat sink 4.energy-saving Energy-saving street sweeperEnergy-saving,good heat sink,no noise, no stroboflash, ... no glare, long lifespan, 5-year warranty.Features:Energy-saving|: Low power dissipation, low heat, and high-brightness ... in normal use,10 times long as fluorecsent lamp.luminous efficiency up tp 95%.Stainless steel ... Full CE and RoHS, SAA Approved energy-saving street sweeper