The original stern light (25W) was replaced by a LED stern light (Series 43 1,5 W) which fits the original mount.
Since the original stern light can be partially obstructed by the Monitor windvane I ordered the windvane with an additional LED stern light (series 34 1W).
Since this light can also be obstructed by the auxilliary rudder of the windvane when not in use, I installed a switch on the motor panel to select between both stern lights.
Installation of switch in the motor panel
Motor panel