The Apollo lamp shines UVC disinfecting light in a 36ft circle to sanitize large rooms (up to 645 ft²) at 360°. Place the unit in a room, choose your disinfection time, and turn the unit on. This queues up the disinfection cycle and will only start after you leave the room. Once you leave, Apollo turns on, and the disinfection cycle begins. The UVC light disinfects the room for the duration of your chosen cycle. Then, Apollo turns off when finished, and you come back to a clean and safe room. Tested in USA labs, The Apollo UV-C Lamp is 99.9% effective in terms of disinfection. It is hands-free sanitation that is chemical-free, eco-friendly, and easy to use.