UPGRADED OPTICAL LENS DESIGN. red light therapy has 18 pcs power -LED, 1:1 ratio of 660nm red 850nm near-infrared light. PRODUCT DIMENSIONS: 4.7 x 4.7 x 4.7 inches; 1.76 pounds. Power : 15W. Power : 36W. The higher the power, the better the effect you will get. NATURAL. NON-INVASIVE. SAFE. The irradiation > 89mW/cm at a distance of 3 inches. Power length: 5 feet. 60-degree beam angle. DURABLE AND FLEXIBLE USE. The V18 red light device is a complete set, with a 36W bulb with an adjustable socket clamp, which is a travel companion. Your light works by emitting red and near-infrared light within a certain range (660nm & 850nm) of therapeutic wavelength and intensity. This device generates a number of health benefits as red light therapy increases the production of adenosine triphosphate, which improves cellular energy production and boosts protein synthesis. Specification: Power : 15W Power : 36W Package Includes: 1 x Red Light Therapy Lamp 1 x Lamp Holder 1 x User Manual