I live in Norway, and used to have a big problem with SAD and longer-than-24-hour-cycles. I tried a few of the commercial lamps like he did, and my experience was similar. They helped some, but not enough.<p>My current solution is to take a 1 hour walk outside every day around noon. Also, I&#x27;ve stopped sitting in front of my computer or TV 3 hours within bedtime. Instead I usually spend my late evenings reading paper books.<p>This has solved the longer-than-24-hour-cycles and most of the SAD (it also seems to have completely cleared up my acne). However, on days when it&#x27;s overcast and kinda dark, I still notice some SAD. On those dark days, the kind of lamp that he built probably would have been nice.