I did a test run for putting mirrors in my windows to increase the light. Robert Smithson meets Gordon Matta-Clark in window of my first floor Brooklyn apartment. I covered a 24" x 36" piece of foam core with tin foil, and strung it up with plastic frame hanging wire. It doubled the light coming into the window (as measured with a light meter).
- Test if you can/cannot see parts of the building with a small mirror (like a darkroom test strip).
- Make a more sturdy prototype out of metal flashing (this will not reflect the image of the sky, which would be useful under fire-escapes.)
- Consider what to do about the blue cast to the light (It is the blue sky, after all.)