side light bulb - type ?

[Enceladus]

hi all
need to get a side light bulb for my bike and i can't remember what fitting it is (bayonet etc.)
at work at the moment so can't go check
if someone can let me know so i can pick one up on my way home id be very grateful
thanks

[packie]

http://www.piaggiospares.co.uk/spares/partImage.asp?GPN=Z9X[%3D989%3C5555&uid=0


5 watt I think.

[Enceladus]

sweet.
many thanks