not an expert on luftwaffe cockpits - but i thought the lever under the gear indicator lights was an on/off switch for the gear indicator lights. cockpit lighting was controlled on rheostat(s) similar to this
similar arrangements apply to raf planes of the era.
afaik lighting was by 'normal' bulbs in torch like fittings around cockpit- not uv until later in the war(~42 for raf with change to green flouro markings on instruments)
in raf planes there was a 'screen' that could be pulled down for night use (spitfire) or knob (hurricane) to prevent blinding by gear lights. someone who can read german might find reference to similar system in pilots notes?
individual warning lights (raf) often had a flip cover with a filter for night use
instrument markings/needles were painted with a luminous 'paste' and 'glow' a soft greennish colour- (certainly not the bright flouro green in il2). again similar paste was used in raf. be interesting to see how 1c deal with this- i'm hoping to see no 'led backlight' effect when lights are switched on in daylight.
as to the 110 pic i think it's safe to assume it's still wip as it has no glass in the instruments yet. the left hand light below turn and slip indicator is still a blank texture
if it's still at this stage i'd expect lighting balance to also be wip
to me one thing that does stand out is the different lighting in different parts of the pit and they seeming to come from different sources