The ABI deep red and near infrared combo LED light bulb emits the most powerful therapeutic wavelengths of 660nm and 850nm. Infrared light is invisible to the naked eye so when using this bulb only half of the chips will appear illuminated. 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: 6pcs 660nm Deep Red + 6pcs 850nm Near Infrared Nominal Rating: 24W (12x2W) Class Power Draw: 14W Beam Angle: 30-degree Irradiance: 53.8 mW/cm² (6' distance); 27.8 mW/cm² (12' distance) Energy per 5 minutes: 16.1 joules/cm² (6' distance); 8.4 joules/cm² (12' distance) Shape: Reflector(R) Size: 24W Class Connectivity Technology: Infrared Controller Type: Push Button Style: 24W Class Color Rendering Index: 87 Color: Combo Type of Bulb: Led Batteries Required? No