For those who are doing some sleep hacking like I have been, there may be help on the way:

Caffeine Free: Blue Light Makes People Alert at Night:

A small study of 16 volunteers found that exposure to short-wavelength light, or blue light, perked them up immediately.

“Light exposure to this system, particularly blue light, directly reduces sleepiness,” said Steven Lockley of the Brigham and Women’s Hospital. “Subjects exposed to blue light were able to sustain a high level of alertness during the night when people usually feel most sleepy, and these results suggest that light may be a powerful countermeasure for the negative effects of fatigue for people who work at night.”

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