Lighting recommendation for roof overhang

red - Where the lamps are ultimately supposed to go

I would have tended towards B2 / 3 according to the graphic. That means, with 16 square millimeters, the cable could be loaded with 62A. 25 square millimeters would probably be too much for a garage if you assume always designing a sub-distribution board for 63A. (You never know what electrification and the future will bring)

Around the cantilever (garage) insulation was done all around, otherwise a cold bridge would arise and there would be a "risk of mold" in the corner inside the garage at the top to the wall.

Oh. Is the garage heated or not ventilated so that insulation was necessary? I didn't ask that question for my garage. But I want to install one or two decentralized ventilation units just in case. Whether now with heat recovery and/or heat exchanger I don't know. How many cm did you insulate, since the overhang is still quite long?

My roof overhang is quite short.

Planned to heat it, but cost/benefit is not worth it since it is not actively heated. However, it adjoins the house on one side.
Garage is made of Ytong and the ring beam has continuous 4cm insulation. The roof gets 12cm and the cantilever has 8cm at the bottom/sides. The thermal bridge tool showed me this, although I think it is quite over-dimensioned. Including plaster and all in all, the cantilever is now 44cm.

...I didn't want to believe it at first either but such a concrete ceiling (WITH cantilever) acts like a cooling fin.

Respect. That means, since it is not heated after all, so much insulation might even be unnecessary. But now you could easily retrofit at any time later or safely use "mobile" heating.