Thanks for your reply.Whats the model number?
Have a look on the below link and see if you can find the bulb.
Neff Cooker Hood Lamps | eSpares
www.espares.co.uk
the model is D77M55N0GB.
See: Appliance assistant for your kitchen appliances | NEFF - https://www.neff-home.com/ie/supportdetail/product/D77M55N0GB/01#/Togglebox=2292/Tabs=section-manuals/
"See bulb holder or rating plate inside appliance for ratings. (on page 6).
Thanks again.Usually the voltage is on the lamp.