4FT LED Light Bulbs, T8 4FT LED Tube Lights 28W 5000K Daylight White, 3360 Lumen | eBay
28w Led Tube Light Bulb 4ft, 3360 Lumens, Cold White 6000K, Ballast Bypass Required, Bypass T8
8Pack of 4Ft T5 28W LED Tube w 5000K White 5000 Lumen,2 PPF/W to Replace & retrofit 54W Fluorescent T5HO Lamps Directly Work w Previous Ballast. - Amazon.com
LED Semi-Flush Mount Light, 28W, 1950 Lumens, Dimmable, Round Close To – LEDMyPlace