Feit Electric 13W/18W/26W Equivalent PL Horizontal 4-Pin Universal Base G24Q/GX24Q-1/-2/-3 CCT Select(2700K/3500K/4100K)LED Light Bulb PL26A/H/CCT/LED/HDRP - The Home Depot
NaturaLED 18W LED PL Bulb, Direct Line Voltage, 4-Pin, G24q/GX24q Base, 4000K (NaturaLED LED18PL/H/185L/4P/840/IF) | HomElectrical.com
1 to 50 Lumineux PL-L 2G11 18w 4-pin Compact Fluorescent Lamp cool white 4200k | eBay