The RubyLux All Blue Antibacterial LED Bulb is comprised of 38 premium intensity light emitting diodes (LED's). This bulb's LED surface is approximately 1.5 inches in diameter, making it fit easily into most lamps or light fixtures. Its top-quality, ultra bright LED's are in the blue light wavelength range at 415nm, well-established to denature the proteins that bind bacteria together, resulting in their death without harming most surfaces. Excellent for killing bacteria on the surface of items such as phones, earbuds, makeup and makeup brushes and more. Also great for killing odor-causing bacteria on items like shoes or clothing. The majority of bacteria are killed within 2 minutes of exposure. Extremely resistant bacteria, however, may require up to 20 minutes of exposure. What makes the RubyLux unique is that it is engineered as a bulb to fit into virtually any US lamp or light socket. RubyLux All Blue Antibacterial LED Bulb is the best option on the market, utilizing superior engineering and manufacturing methods to bring you the most effective technology at the lowest possible price. Average bulb life is two years with normal use. Instructions and safety information are delivered electronically after purchase and are also included with the product. This bulb is 120V and is intended for use in the US, Canada and other countries with 110-120V power systems. Package includes one (1) bulb only. All other items, such as RubyLux Bulb Cover Shields and RubyLux Basic Goggles are sold separately.