Here is the mostly finished exterior. This box employs a hinged door at the front. A sliding door would have worked better, but requires a high part count. This system wasn't suppose to. I used some 2x6" boards to create a lip around the edge of the door. Remember that light's path doesn't bend in it's travel (well, unless you have a whole lot of gravity—and I'm not that big), so the only way it can turn a corner is by being reflected. The more it needs to be reflected, the more loss of light there is—especially if the surface it's very reflective (like a chunk of wood). So making a lip reduces the total light coming in.
What turns out to be the big problem with this door design is getting a good close. The wood is slightly bowed and there isn't much I can do about that. It does bend, but so far, my attempts at making a latch have failed. I have a new plan, but it requires more hardware. For now, light can and does leak in pretty bad.
For ventilation I tried a small centrifugal fan. That failed to move any noticeable quantity of air. So I resorted back to my original centrifugal fan, which is much more powerful then I need but does the job of moving air very well. Visible is the air outlet on the front door. It is actually a roof vent and does a fairly good job of blocking out light. I plan to add a second angle on the inside of the box for the light to have to travel that should really take care of light leaking in from the vent. But the light let in by the door is a much bigger issue for now.
Some people question why I sleep in a box, and my usually response is that I'm sensitive to light while trying to sleep. Well the reality is that sleeping in complete darkness is actually recommended by medical professionals. Some even claim it reduces the risk of cancer
. I just like having a good solid nights sleep.