What does LED tri-proof light protection standard IP69K mean?

The code for the enclosure protection class is usually composed of the characteristic letter IP and two characteristic numbers. The first figure refers to the following: preventing the human body from touching or approaching the living parts inside the enclosure and touching the moving parts (except for smooth rotation and the like) to prevent the protection of solid foreign objects into the enclosure; the second figure refers to preventing water from entering the enclosure The interior achieves a degree of protection against harmful levels.

The first marked number definition:

IP6X Dust-proof: It completely prevents the intrusion of foreign objects and completely prevents dust from entering.

The second tag number definition:

      IPX5: To prevent the intrusion of water: prevent water from the nozzles from all directions to enter the lamp to cause damage.

      IPX6: To prevent the intrusion of large waves: lamps installed on the deck to prevent damage caused by the invasion of large waves.

      IPX7: To prevent water intrusion when flooding: The lamp is immersed in water for a certain time or water pressure below a certain standard to ensure that it does not cause damage due to water.

      IPX8: Prevent intrusion of water when sinking: The lamp sinks indefinitely under specified water pressure conditions to ensure that it is not damaged due to water ingress.

      IP69/69K: Capable of withstanding the thermal steam wash test defined in EN 60529 and DIN 40050-9. This provides protection against water pressures of 100 bar (1450 psi) and temperature of 80oC. The pressure is applied directly to the sensor at progressive angles of 30 degrees (0, 30, 60, and 90 degrees) for 30 seconds at each angle for a total of 120 seconds (2 minutes) to prevent water ingress.