Note: Because it is a COB light source, there is no light bulb inside, and the product can usually be used for more than 10,000 hours. Specification: ✍Shape: Round ✍Color Temperature: Daylight (6000-6500K) / Natural White (4000-4500K) / Warm White (2700-3200K) ✍5W： 2.5 inch. Diameter 80mm ✍10W： 4 inch. Diameter 100mm ✍15W： 5 inch. Diameter 1200mm ✍25W： 5 inch . Diameter 140mm ✍1 Year Warranty Assemble Type: Ceilling Type (No need hole) Material: Alunimum ✎✎Ultra thin design, perfect for sloped, shallow and other types of ceilings. ✎✎LED light design, eco-friendly and energy saving. ✎✎No dark area projection, to solve the direct glare obstacles to protect your eyesight health. ✎✎New stylish paint body, arc technology, the best light body is gentle and elegant atmosphere. ✎✎ It is very suitable for your rooms, corridors, balconies, stairs, kitchens, laundry rooms and many places that need bright ceiling lights. ❤❤Is this battery operated? ---No . It uses electricity .You need to connect the current to the back of the lamp wire is ok .