Originally posted by vilem.krejci:

Very expensive barely visible small lamp ;-)

When you look at it, it appears just as a little white dot. But it cast a decent light in front of it.
And yes, its expensive, but after some time your gold starts to accumulate and there is nothing to spend it at. I spent 9000 gold at portal hub and still have more than 20000.
https://steamcommunity.com/sharedfiles/filedetails/?id=2725762502