Philips 28W Equivalent 46 in. High Efficiency Linear T5 InstantFit Cool White LED Tube Light Bulb (4000K) 542423 - The Home Depot
Amazon.com: 8 Pack of 4Ft 28W T5 LED Tube w Sun 6500K and Over 2.0 PPF/180 Lumen/W, Perfect Replace T5 54W Directly Work w Previous Ballast to get EZ SystemUpgrading and 50%
Crompton Fluorescent T5 28W High Efficiency 6500K | Lightbulbs Direct
Osram SubstiTUBE LED T5 (HF) High Efficiency 17W 2400lm - 865 Daylight | 115cm - Replaces 28W| Any-lamp