No snaps on bulbs and sockets! 660nm red and 850nm near infrared, deep red can be absorbed by the skin more effectively and repair skin problems. Infrared 850nm penetrates deep into the skin, increasing the slight pressure through the skin to the pain point, reducing the pain more effectively, and providing the necessary energy for the cellulose. In order to restore nutrition and eliminate waste, red light therapy is very suitable for repairing skin, reducing pain, weight loss, etc. 850 nm infrared light is invisible to the human eye, 6 of which are 850 nm, there are 660 visible lights, 6 beads, 3W red and 42mil infrared light, so when this bulb is used, only half of the chip will be illuminated bright. Our infrared bulbs can improve blood circulation. The infrared heat effect of the infrared lamp can relieve pain. The light efficiency is higher than the traditional small phototherapy lamp, and the UL power makes you feel more comfortable when using it. The 30 degree glass lens can increase the irradiance> 100mW/cm2. The knee and waist are treated for 20-30 minutes each time.If there is any problem with the product, you can contact us and we will solve the problem for you. Warranty: 36-month warranty plus 30-day satisfaction or return guarantee, 100% refund.The lamp has 6 lamp beads with 850nm light, which is invisible to human eyes. It's not that the product is broken.If the bulb does not light up It may not be fully installed and needs to be twisted into place.If the product is not bright, contact us and we will deal with your problem Easy to use: Designed for standard E26/E27/A19 sockets, AC85~277V, easy to install and durable. You can enjoy light therapy at home anytime. The high-power LED phototherapy bulb has a built-in qualified radiator to achieve better heat dissipation effect and lasting use.