... Lamp source 4 lamps 8 lamps 12 lamps 16 lamps LED rated power100,000hoursLight sourceLEDColor temperature≥6500kLuminosityAdjustable continuously, 0-6500Lux, ... :≥6500kBrightness in the center of screen: ≥2000cd/m2, 3000 and 4000 cd/m2(6500Lux, 9750Lux, 13000Lux)Uniformity coefficient of screen ... than 2%Light source frequency : 50000Hz.rating life of LED: 100,000h. LED Negatoscope (single film)