Try to use all the natural light that comes to us from our earth. Green light is light from the sun, and not fluorescent bulbs. In fact, I’d even go so far to say that what a wonderful world it would be if we operated based on when our day was light — and our night was dark. Our body rhythms would be in tune with this natural course of living. Perhaps light is sending us a message of when we should work, engage with people, and when we should sleep, rest, rejuvenate.