Oh dear! You may call me stupid, but I didn’t quite get how the SimvarWatcher UI was actually supposed to work:
Trying to “set a value” actually affects the currently selected row in the right-hand table - not what is seemingly selected in the “Simvar Name” combobox!
And that is good news! Because once I figured this out (also see my other question about CANOPY OPEN and TAILHOOK POSITION) I am now able to successfully turn off and on various lights: I just tried it with the Extra (aircraft) and I am able - via SimvarWatcher - to enable/disable the following lights:
- LIGHT LANDING
- LIGHT STROBE
- LIGHT NAV
- LIGHT BEACON (although I do not see such a light on the aircraft visually)
(The Extra does not have more lights)
That is great news, because it seems we can now use the simulation variables instead of the (now legacy) events to control aircraft lights - or so it seems…