None? Model : KT/SL/20W ? Input Voltage Nominal : 230V AC ? Input Voltage Range : 110 - 270 AC ? System Wattage : 20W±2% ? Input Frequency : 45 to 55Hz ? Power factor : ? 0.95 ? THDi : ? 10% ? Efficiency : ? 85% ? Operating temperature : 0°C to 55°C ? LED Make : NICHIA / CREE ? LED Lumen : 140lm/W ? LED Viewing angle : 120? ? Secondary Optics : 85?x135? ? LED PCB Material : Metal clad PCB ? LED CRI : > 72 ? LED Color Temperature : 5500-7000K ? LED Life span : 50,000 hours ? Electrical Protections Short Circuit, Reverse Polarity, surge: 5KV Protected beyond 300 VACand High Voltage:1.5 KV Open Circuit Protection, Insulation resistance 500V DC ? Casing Material : Aluminum Die cast ? Finishing : Powder coated 70 Microns ? Diffuser : Toughened Glass 4MM ? Ingress Protection Grade : IP-65