llluminate docks, decks, walkways and landings without the expense and maintenance of wiring. Highly efficient solar powered LED lights provide up to 10 hours of illumination after exposure to only 4-5 hours of sunlight. Fully automatic, on-at-dusk operation. For post, pier or dock mounting to enhance both visibility and safety. Fully weatherproof, built to withstand harsh marine conditions and will provide years of reliable service. 3-1/4"H x 3-5/8" D, AAA Battery. Adapters included to fit pipe sizes 1-5/8", 1-7/8", 2-3/8" and 3-1/4". Pack of two lights.Switchable Red, Yellow, Orange, Blue, Green, White.