[cuspycode]

My wife got one of those (or a similar model), and it was very helpful for her, especially during the toughest part of winter here when it's completely dark for 17 hours. For me on the other hand, I just made a deliberate mental switch when I was around 35 years old when I decided, for efficiency reasons, to stop working late evenings and doing all-nighters, and tried to catch the early bird instead. The switch was surprisingly easy for me, but YMMV of course. And I've since started working late evenings for a bit again, but my sleep habits have stuck.