I installed a pair in a 50' x 75' store. I figured I would have to install 4 of these lights. After installing a pair in the right half of my shop I was amazed at the quality of the daylight. Wonderful! I highly recommend this product for the quality and price! Perfect! My only regret is that I didn't buy 2 or 3 sets to install at the same time. At 18 feet, the coverage is 360 degrees and about 20 feet in diameter on the ground. In another set, the store would have been 100% covered. I hope this link helps someone calculate how much to buy.
Lamp LED Yeelight Smart LED Bulb W3 (YLDP005), E27, A60, 8 W, 6500 K
47 Review
Smart bulb Yandex with Alice, base E27, 8 W, RGB color
76 Review
Lamp LED Xiaomi Mi Smart LED Bulb Warm White (XMBGDP01YLK), E27, 8 W, 2700 K
26 Review
Royal Canin Gastrointestinal Low Fat Dry diet food for adult dogs with digestive disorders, 12 kg
23 Review