Even light bulbs have an energy rating, and this one is A-rated. On this light bulb you'll find a 2G10 socket.
From Amazon
Osram Dulux F 24 W/830
LED Bulbs
Osram Dulux 24W PLF T16 2G10 Warm White - 4050300333588
Big on Electricals
Osram Dulux 24W PLF T16 2G10 Warm White - 4050300333588