This energy-efficient light bulb is perfect if you're trying to keep energy costs down. This particular model has a so-called 2G11 socket, so make doubly sure that it will fit.
From Amazon
Osram 999048325046 2G11 80 Watt Compact Fluorescent Light Dulux Lamp
LED Bulbs
Osram Dulux 80W PL-L 2G11 Warm White - 665467
Big on Electricals
Osram Dulux 80W PL-L 2G11 Warm White - 665467