Product descriptions from the supplier Overview Product features: This series of products are mainly used in optical processing, optical coating industry of various lenses inspection, with energy saving, small size, continuous dimming and other characteristics, more importantly, this product uses the world's advanced imported LED, its life up to 20,000 hours, greatly reducing the user's cost. Input voltage 100-240VAC,50/60HZ Power consumption 50WMAX Maximum luminous flux 2500 lumens Lighting mode Constant current lighting Brightness control 0100% Irradiated area Diameter 50mm circular plane Spectral characteristic Temperature 4500K (LED-400WB) Temperature 3000K (LED-400WA) Product size LXWXH=205X115X130mm Product weight 2KG