China International Standard for waterproof grade IP of LED light is closed to that of Japan Industrial Standard JIS ,which is divided into 9 grades ,from 0 to 8 grade. While ,the IP rating also makes provisions for dust. Details as follows:
The first X stands for dust-proof
0: No protection
1. Avoid the invasion of large solid
2. Avoid the invasion of medium-sized solid
3. Avoid the invasion of small solid
4. Avoid the invasion of solid objects greater than 1mm
5. Avoid the accumulation of harmful dust
6. Completely avoid the invasion of dust
The second X stands for waterproof grade:
For example: light marked IP65 stands for product completely avoid dust and rinse without any harm.