The Ushio 3000304 is a plug-in ultraviolet germicidal lamp. It is primarily used for controlling algae growth in aquariums, though it can also be used for other air or water sterilization purposes. This germicidal lamp has a 2-pin, G23 base and is compact in size to make installation and replacement easy. This lamp operates using only 9 watts and is rated to last a lifetime of 8,000 hours. Germicidal lamps emit potentially harmful UV-C radiation and are not to be used for general illumination. Protect your eyes and skin when operating germicidal lamps.