used in 12volt DC auto motors, such as RV, travel trailer, motor-home, camper, boat, yacht, etc, works as stair step waterproof processed light body well fixs in wet with rust and UV prevention 316 SS shell, makes downward soft lighting. It is an excellent stairway indicator without harsh fine LED chips, has a long life span more than 30,000 surface mount designed, fix the light with two screws. Mounting screws are not included.