This is a pretty big claim: >The effect was huge: I became dramatically more productive between 3:30pm and whenever I turned off the light. Instead of having a

This is a pretty big claim: >The effect was huge: I became dramatically more productive between 3:30pm and whenever I turned off the light. Instead of having a strong urge to stop working whenever it got dark out, I was able to keep working my normal summer schedule, stopping just before dinner. I estimate the lamp bought me between half an hour and two hours a day, depending on how overcast it was. Does anyone know if people really do become "dramatically more productive"? It should be something that could be tested...