Fluorescent bulbs have an advantage in that they are more energy-efficient than conventional bulbs. On this light bulb you'll find a G13 socket.
From Amazon
Osram 30 Watt Lumilux T8 Fluorescent Lamp Sockets
LED Bulbs
Osram 30W T8 Fluorescent Tube 900mm 3FT Cool White- OS518039
Big on Electricals
Osram 30W T8 Fluorescent Tube 900mm 3FT Cool White- OS518039