The manufacturer of SMD5050 waterproof IP68 LED strip tells you that LED lights have a waterproof and dustproof rating. I often hear about IP68 waterproof LED strips. So what does IP68 mean?

The manufacturer of SMD5050 waterproof IP68 LED strip tells you that LED strips are classified into waterproof grades according to the materials they are made of.
IPXX
XX is two digits,
The manufacturer of SMD5050 waterproof IP68 LED strip tells you that the first one is the protection level against solids. There are 7 levels, 0-6 respectively.
The manufacturer of SMD5050 waterproof IP68 LED strip tells you that the second digit indicates the level of protection against liquids. There are 9 levels, 0-8 respectively.
Dust level:
0: no protection
1: Prevent the intrusion of large solids
2: Prevent the intrusion of medium-sized solids
3: Prevent the intrusion of small solids
4: Prevent solid objects larger than 1mm from entering
5: Prevent the accumulation of harmful dust
6: Completely prevent dust from entering
Waterproof grade
0: no protection
1: Water droplets into the shell have no effect
2: When the shell is tilted to 15 degrees, the water droplets into the shell have no effect
3: Water or rain has no effect from the 60 degree corner to the shell
4: The liquid splashed into the shell from any direction has no harmful effect
5: Rinse with water without any harm
6: Can be used in the cabin environment
7: It can be resistant to water in a short time (1m)
8: Long-term immersion in water under certain pressure
The manufacturer of SMD5050 waterproof IP68 LED strip tells you the waterproof grade of the LED strip. The most common ones are IP20, IP65, IP67, and IP68.
The manufacturer of SMD5050 waterproof IP68 LED strip tells you that you usually buy the corresponding waterproof grade of the light strip according to the actual use environment.
The manufacturer of SMD5050 waterproof IP68 LED strip tells you to use it indoors. For ceiling lighting, you can choose a non-waterproof light strip. For underwater use, such as a swimming pool, you can choose a waterproof grade of IP68.