C-US certified. Dry rated. This product is made from Steel. Number of Bulbs: 4 Type of Bulbs: Candelabra Bulb Base: Candelabra This fixture is dimmable. Product Specification Sheet Onyx makes a sculptural statement with a minimalist frame and discretely hidden LEDs, each lit from within to create a modern work of art. Bold and striking, Onyx casts strong and dimmable light in any space.