Specifications: Infrared light is invisible to the naked eye so when using this bulb only half of the chips will appear illuminated. The red light bulb is equipped with 60 degree glass lens and additional super large optical lens which improve the Irradiance > 141mW/cm2. Target treatment for your face shoulder knee waist 20 minutes every time. It is designed to deliver infrared heat to the body. The infrared heat improves the blood flow and circulation of the target area, encouraging muscles and damaged tissue to heel. The high power led light therapy bulb has built-in qualified heat sink for better heat dissipation, which is durable to use. Type 1 has a light; type 02 has a light and a US plug lamp holder; type 03 has a light and a EU plug lamp holder, totally 3 options, please choose the option as you need. Item Name: Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Infrared Heat Lamp Or 1 x EU Plug Storage Rack