The waterproof rating is usually indicated by an IP code, such as IP65, IP66, etc. The first digit after IP represents the dustproof rating, and the second digit represents the waterproof rating. For solar lights used outdoors, it is recommended that the waterproof rating be no less than IP65. Such lights can effectively resist rain washing and spraying, and are safe for normal outdoor use, but they should be avoided from being soaked in water for a long time.