18 Watt Long Twin Tube Compact Fluorescent PL Bulb with 4-Pin (2G11) Base, 3500K - FT18DL/835
Feit Electric 13W/18W/26W Equivalent PL Horizontal 4-Pin Universal Base G24Q/GX24Q-1/-2/-3 with CCT Select LED Light Bulb (4-Pack) PL26AHCCT/LED /HDRP/4 - The Home Depot
GE Biax 26-Watt T/E ECO Triple Tube 4-Pin Light Bulb - #37132 | Lamps Plus
HOW TO] replace a 4 pin fluorescent lightbulb (recessed lighting) - YouTube