PL18W/2U/4P/841 - 18 Watt -4-Pin - 4100K CFL - G24Q-2 Base - LED Lighting Space
Feit Electric 18-Watt Equivalent PL CFLNI Quad Tube 4-Pin G24Q-2 Base Compact Fluorescent CFL Light Bulb, Soft White 2700K (1-Bulb) BPPLD18E/HDRP - The Home Depot
Philips 18W 4 Pin 2G11 Cool White Long Single Twin Tube CFL Bulb | PL-L 18W/41 (4-Pin) | Bulbs.com
18 Watt CFL Light Bulbs | 4 Pin GX24Q-2 Base 6500K Full Spectrum | 18W High Output 1200 Lumens | Triple Tube Compact Fluorescent Light Bulbs Plug-in | 10 Pack by GoodBulb - Walmart.com