Olafus 18W LED Ceiling Light 9 Inch (IP54 Waterproof) – from $13.79 + FSSS

Olafus via Amazon has 18W LED Ceiling Light 9 Inch from $13.79 when you clip 40% off Coupon on the product page.
18W 4000K Natural White
18W 2700K Warm White
18W 5000K Day White