Introducing the PN: A20040 Classic Lamp, the perfect addition to your aquarium to keep your water clean and clear. This 40 Watt ultraviolet lamp is designed to effectively eliminate harmful bacteria and algae, ensuring the health and safety of your aquatic pets. With a length of 33-3/8", this lamp is suitable for a variety of aquarium sizes and is easy to install. Its high-quality construction and reliable performance make it a must-have for any aquarium enthusiast. Give your underwater friends the best environment to thrive with the PN: A20040 Classic Lamp.