Upgraded Red Light Therapy Lamp: Each therapy light bulb has 18pcs high power leds in total. 9pcs 660nm deep red leds + 9pcs 850nm near infrared leds making it the best wavelength for light therapy. Infrared light is invisible to the naked eye so when using this bulb only half of the chips will appear illuminated Optical Lens Design: 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 Drug Free & Non-Invasive Pain Relief: Designed to deliver infrared heat to the body. The infrared heat improves the blood flow & circulation of the target area, encouraging muscles and damaged tissue to heel Easy and durable to use: Designed to fit standard E26/E27 socket, 100~240V AC, Easy to set up and use. Enjoy light therapy at home, whenever you want to. The high power led light therapy bulb has built-in qualified heat sink for better heat dissipation, durable to use