Hasn't he ever taken a nap?
The problem I had was with the whole premise. So he has trouble going to sleep because it is Alaska and always light. Uh, hasn't he ever taken a nap at 3 in the afternoon? They are heavenly. I have no problem knocking out in the light. I know there is more to it than that with his character but if they had set it in the continental U.S. and day and night come, would he have insomnia still? If you don't see my point, if I went to Alaska, and midnight rolled around and it is bedtime, I could lie down and still sleep even with the sun glaring in the window because it doesn't matter. Use the noon nap reference, it works.
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I did sixty in five minutes once...