Continuing over from LG - With a lantern with double tap ballast, you could wire it with 4 core (L's to both ballast taps) and implement part night dimming with a relay in this box

IIRC such relay circuits use a small power resistor (order of 5W, dont recall resistance value) either in series with the lower power tap or in parallel to the short part of the winding, to prevent drawing an arc while the relay is switching and shorting the ballast between the taps

I have seen such circuit in my visit to Michael in Switzerland (such dimming was not used in Israel, here it was done just by switching off every other lamp). He probably can provide the details

In this case, you might want separate POh ang kWh meters for each mode

Neat little idea... In a big box! Where are you going to tuck that away?

It's not that big tbh. 30 x 20 x 15cm. Will be on the wall of the raised patio section next to where I have the pole sunk into the earth.
I would have liked to have used slotted panel trunking to tidy up the wires but the stuff I have is too big for it lol.

Well you could use the spiral cable wrap...

But for real, overuse of "proper installation materials" in simplish boxes is one of those things that ding me a bell of alarm. It's a long story which deserves a post of its own if it is of interest