Boris wanted to build a light box for his sister, who suffers from Seasonal Affective Disorder, a disorder brought on by lack of exposure to bright light in darker winter climates.
My sister suffers from seasonal affective disorder, also known as winter depression. A commonly prescribed therapy is light therapy - about thirty minutes of bright light in the morning. Bright in this context means more than 10 000 Lumens. You can of course buy commercial light-boxes, but I wanted to construct one by myself.
He neglects to point out that commercial light boxes can run $200+ and that building you own is a really economical choice. By repurposing a wooden filing box from Ikea, buying some compact fluorescent bulbs and some basic light sockets he was able to craft a very serviceable light box for his sister that exceeded the 10,000 Lumen requirement by nearly 6,000 Lumens.
Lightbox Construction [via Make]