FYI
all of you struggling with Moritz engine gauges in your panel.
The lighting is dual purpose. There is a set of incandescent bulb for night lights that are controlled from the panel light dimmer switch.
There is also a second set of incandescent bulbs for day time back lighting that are internally controlled
Two sets of "grain of wheat" bulbs are T-1 style
BUT....
the night time bulbs (those with blue light) are 28v
the day time bulbs are 5v.