Fluorescent Lamp
From Amazon
Bell Lighting 22W T9 Triphosphor Circular Tube - 4 Pin, 4100K
LED Bulbs
BELL 22W T9 Triphosphor Circular Tube - 4 Pin 4100K Cool White - BL04194
Big on Electricals
BELL 22W T9 Triphosphor Circular Tube - 4 Pin 4100K Cool White - BL04194
Lamps 2U Direct
22 watt Cool White T9 Circular Fluorescent Tube