54W T5 Fluorescent Bulb | 5000K Color Temperature Light Bulb
Amazon.com: VIVOSUN T5 Grow Light Bulbs 54W 6500K HO Fluorescent Tubes Light Bulbs, Cool White T5 Bulb for 46 Inches T5 Light Fixtures, T5 Grow Lights for Indoor Plants, Pack of 5 :
Sylvania Part # 20906 - Sylvania 54-Watt 48 In. Pentron Ecologic Linear T5 Fluorescent Lamp Light Bulb (40 Per Case) - Fluorescent Light Bulbs - Home Depot Pro