Some thoughts about the dark rooms of the fort...
Example: the corridor


1. renunciation (Verzicht, renonciation) of daylight, just using electric light

pros and cons: it is easy to install such a light system and you have the same light conditions day and night but it does not fit to all using

2. big breaches (Durchbrüche, trouées) through the side, just like windows

pros ans cons: there is a lot of daylight in the rooms and you can look outside but I do not know if it is even possible. You would have to install lights for night.

3.small breaches with some sort of light catching funnels (Trichter, entonnoirs). Mirrors ot the sides would reflect the light and bring it into the rooms

pros and cons: the constuction is not that difficult like the other one and you would have daylight in the rooms but you are not able to look outside.