RAIL-spotlight ceiling light, black rail. Includes 4 Hao Deng smart bulbs. ◎Ceiling Light Easy to install, no construction required Duct rail: (approx.) width 1000 x depth 130 x height 78mm (1 meter) Spotlight: (approx.) diameter 40 x height 133mm Weight: approx. 1,400g Load capacity: approx. 5kg Material: Steel Retail price: ¥6,600 Installation method: Ceiling plug Rated voltage (frequency): AC100V (50/60Hz) Compatible bulbs: Socket/E26 up to 15W x 4 Lighting method: Wall switch ◎Smart Bulb Hao Deng (Uses the Magic Home Pro app. Currently not available on Amazon) Socket: E26/E27 compatible Size: 60*60*118mm Input voltage: AC100-240V, 50/60HZ Rated power consumption: 7W Color temperature: 2700K-6500K Rated lifespan: approx. 20,000 hours Beam angle: approx. 120° Luminous flux: 600 lumens Retail price: ¥4,399 Both have been used for about 4 years, but there are no noticeable stains. Please feel free to comment if you have any questions. Also, the price is set considering the shipping cost, so I am not considering a discount. I am also selling on other sites, so please purchase after commenting.