40Pk - SUNLITE 28w T5 High Performance Straight Tube G5 Mini Bi-Pin Base 6500K Daylight - Walmart.com
SYLVANIA 1149mm 28w T5 HIGH EFFICIENCY FLUORESCENT TUBE IN 865 / DAYLIGHT WHITE | eBay
T5 Fluorescent Batten Light 2 X 28W - Arlec UK
HydroFarm - T5 Fluorescent Tubes #
The T5 Fluorescent Lamp: Coming on Strong | EC&M
F28T5/850 28W 4 ft T5 Linear Fluorescent Lamp 5000K 48 In. [Case of 50]
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
Sunlite® 30342-SU F28T5/850 28W Fluorescent T5 Bulb, Mini Bi-Pin, Super White - Pkg