We are taking out a large staircase at the back of our house and rebuilding a smaller version in the middle of the house off the hallway to create a big kitchen diner with bifold doors that will completely transform the house. The work is happening while we are on a two week holiday. Our builder has just phoned to say the new stair well is very dark and is there anything we want him to do about it. I have to make a decision pretty quickly but has anyone installed internal glazing to bring light into a stairwell or a sun tunnel or is a dark hallway not much of a problem since you don't really stop there? Any advice/experience would be much appreciated.