1.Low lighting decay .decay less than 2% afer 1000 hours; 2.Good reliability,no dead.bulb and no moting; 3.No plaring , safty. SPECIFICATION Dimentions(mm)D77*1.5Luminous Surface Dimentions(mm)D62Input (Vas)DC24V800mAPower (W)20WLuminous Efficiency(Lm/W)70-120Color Temp(K)3000-6000CRI60-85PRODUCT FEATURES1.low lighing decay less than 2% after 1000 hours;2.Equable and soft irradiancy .no glaring ...