The ABI deep red LED light bulb emits the most powerful therapeutic red light wavelength of 660nm 50,000+ hour service life 3-year manufacturer's warranty Assembled in the USA Fits a standard household E26 socket 100-240V AC input LEDs: 12pcs 660nm Deep Red Nominal Rating: 24W (12x2W) Class Power Draw: 14W Beam Angle: 30-degree Irradiance: 51.8 mW/cm² (6' distance); 26.8 mW/cm² (12' distance) Energy per 5 minutes: 15.5 joules/cm² (6' distance); 8.0 joules/cm² (12' distance) Connectivity Technology: Normal bulb Controller Type: Push Button Style: 24W Class Color Rendering Index: 80 Type of Bulb: Led Batteries Required? No