https://normanlamps.com/cf18dd-835-eco.html
CF18DD/835/ECO - Double Twin Tube CFLs
CF18DD/835/ECO (20677) - 18W, G24D-2 (bi-pin) base, CFL, 1,150 lumens - Double Twin Tube CFL, 10,000 life hours by Sylvania | Shop at Norman Lamps
twin tubeecodoublecfls