This product total 7 sizes: 12 inch . 13 inch. 14 inch. 15 inch. 16 inch. 18 inch. 20 inch. (E26 base, 110V) 3 kinds of color: Black . Brushed Nickel . Brushed Bronze. Do not install on sloping ceilings ,you cannot adjust the brightness of the light. 3 colors and 3 effects This color is the most classic and can be installed in farmhouse fixture and modern living rooms. This product is also a luxury and low-key product to install in the bedroom. This surface is treated to protect your light from corrosion in wet environments.