The IP Code (sometimes referred to as Ingress Protection Rating or alternatively International Protection Rating) tells you what an electrical enclosure is designed to protect against.
The code is made up of two digits,and you may find a LED lighting product on the Brandon lighting website that has an “IP” Rating of 65. The first digit represents protection against ingress of solid objects, with a “0” meaning “not protected at all” and a “6” meaning that the device is completely protected against intrusion from the smallest particles of dust.The second digit represents protection against ingress of liquids with a “0” meaning not protected at all, all the way up to an “8,” which means you could safely take the thing scuba diving.
The higher the number the greater the protection. Lower numbers are better suited for inside carpeted areas like office LED lighting, school LED lighting, and LED lighting of churches. If you’re buying LED lighting for a food processing environment, you want the lighting to be rated to IP65 or higher. The 6 means that your fixture is completely protected from dust intrusion, and the 5 means that the fixture is protected from “Water projected by a 6.3 mm nozzle against enclosure from any direction.”