with right-click.
Rework glowlight slab and cube textures, simplify,
use overlays and compositing, so that the bulk
of the light can switch between a dark, matte surface,
and a bright surface with central glare gradient, and
so that the surface and eging respond to param2 color.
Tweak all other relevant nodes so that their light
source changes to a darkened (or even translucent
texture) when off.
On/off switching doesn't affect things like oil lamps,
candles, chandeliers, etc. Just basically the stuff
that would be electric-powered in real life.
If in a protected area, only that area's owner can
turn the light on/off.
