The Penn Plax Ultra Bright Mini LED Light is made of translucent plastic that is fully submersible and waterproof. Featuring 6 ultra-bright LED bulbs, this 4 inch light fixture is perfect for your tank or bowl. Simply attach it to your tank via the suction cups (to the wall) or the clip (to the tank frame). Its accents will lighten and brighten up your tank, fish, decor, and plants