Welding in the night

Spotted this welder one deck below me.
Welding some cracks in the outer casing of the boiler.
These cracks occur sometimes because of thermal stress during startup and cool down of the unit.
We do infrared photographing when we suspect a leak and so we can see quite precise where the cracks are.

Tonight the clock goes back one hour so we have to work a bit extra.
Furthermore it's the "night of the night", an event to try and make our province as dark as possible.
We turned off almost all of the lights outside the plant but our collegues of RWE at their newbuilding site had forgotten that I guess.
Still plenty light.