The RubyLux All Red & Blue LED Bulb is comprised of 5 high-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 Red light wavelength range at 660nm and blue at 415nm. What makes the RubyLux unique is that it is engineer to fit into virtually any US lamp or light socket. RubyLux All Red & Blue 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 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 Basic Goggles are sold separately.