Update
Updating database... Please wait.
Thursday 31 May 2018 at 00:13
Hi Rolf-It is a standard 1156 car bulb (US) = "Philips 1156 Standard Auto Bulb (Pack of 2) Philips brand miniature automotive lamp. 26.9 Watts and 12.8 volts. S-8 size and shape, single contact bayonet base."
Source: http://pinside.com/pinball/forum/topic/cold-case-files-aquarius-kickout-hole-scoring/page/2#post-4426279