LED Ceiling Light for 10 Tatami Mats, Dimmable and Color-Adjustable, Wood Grain I installed and turned it on once, but it's practically unused. I've confirmed it works correctly. Includes remote control (2.4GHz band communication). It also has a memory function that remembers the previous settings before turning off. In addition to the main lighting, there is also indirect lighting that illuminates the ceiling. You can turn on the main lighting only, main lighting + indirect lighting, or indirect lighting only. The main lighting is steplessly dimmable and color-adjustable. Brightness: 5200lm Suitable Area: 10 tatami mats Size: Approximately 40cm in diameter, approximately 3cm thick (slim type)