Simply Conserve T8 linear 32-Watt EQ 48-in Cool White Medium Bi-pin (t8) Linear Type A LED Tube Light Bulb (25-Pack) in the LED Tube Light Bulbs department at Lowes.com
LED T8 Tube - Basic - HOFTRONIC
T8 LED Tube Lights - 4 ft. -18 Watt - 36W Equivalent