IPX8
The IPX8 degree of protection is one of the standardized IP classifications (International Protection) and defines the resistance to water penetration for devices such as flashlights and lights. The number 8 stands for a very high degree of watertightness and allows "protection against damage caused by permanent immersion for an indefinite period of time". Although waterproof for most outdoor activities, devices with the IPX8 classification should not be used explicitly for diving.