Satco Part # S8155 - Satco 22-Watt 9 In. T5 2Gx13 Base Circline Fluorescent Black Light Tube Light Bulb In Warm White - Fluorescent Light Bulbs - Home Depot Pro
55W T5 2GX13 Circline Fluorescent 3500K Bulb by Satco Lighting at Lumens.com
Osram FC 40W/830 2GX13 4 Pin T5c Fluorescent Lamp 40W 3000K Warm White Tube | eBay