Last time I checked mate, the light tool works with the script, unless they have disabled it for some silly reason. With the button that sounds like a bug, and with the chairs that sounds like someone doesn't know how to use a phys-gun .
I think the light and emitter have been removed on purpose because they caused crashes. The chair is not moveable by physgun because people would minge around with it (I think?), and the button is a glitch which needs to be fixed.