>>/38672/
I'm glad I can be of some help.
> There are plenty of work for all my lifetime already
That sounds very familiar to me.

 >>/38673/
Hmm. If you want two lamps to the ceiling you could do this.
1. one Line and 0 for the lamps at the ceiling.
2. one Line, one 0, one Ground to the sockets at the boiler
3. one Line, one 0, one Ground to the sockets at the table
4. one Line and 0 for the lamp at the boiler.
If you use picrel to the lamps at the ceiling they can dangle from the wires. And the wires have to be fixed up there anyway. Won't be nice, but less drilling.
Gluing is an option, maybe that two component stuff. Or maybe patches of pur foam.