[100-120v ONLY, Residential Version] PacLights Ultra250 Performance LED Light Bulb 50-watt, Daylight / Bright White, 250w to 300w Equivalent Replacement (4321 lumens), E26 Medium Base Replace 250W Incandescent bulb by 50W LED, Save Over 80% Energy 35,000 Hours Lifespan. Even Works in 158 Degree Fahrenheit Active Cooling Technology: Quiet and Efficient Oil-less Bearing Fan High Performance LED Chips, Electrolytic-Capacitor-Free Driver, Overheat Protection Eco-Friendly. No lead or mercury. No UV or IR Radiation