With high power factor >90%,the outdoor led post top light cut down electricity bill over 90%. Easy to install on a 2 3/8-inch OD tenon & less than or equal to 3 inch pole.The led post top light 60w can be applied to pathway, walkway, driveway, road, street, yard, farmyard, park, garden, playground, school, store, parking lot or other outdoor area (Input Voltage: AC 90V-260V.).Nice choice for contractor!