Case of 40) GE 46762 - F54W/T5/850/ECO Straight T5 Fluorescent Tube Light Bulb - - Amazon.com
T5 HO Ballast Bypass 4FT LED Grow Lamp – Sun White Spectrum – Active Grow
Simply Conserve T5 linear 54-Watt EQ 46-in Daylight Miniature Bi-pin (t5) Linear Type A LED Tube Light Bulb (25-Pack) in the LED Tube Light Bulbs department at Lowes.com