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 :
E-Simpo® 50-Pack CFL T8 to T5 Fluorescent Tube Side Cap Adapter G13 to G5 Tube Socket Adapter T8-T5 Tube Side Cap Converter, Allow You Install T5 28W CFL into T8 Fixture (L36
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