I used to find that whenever i was in a supermarket or mall or some sort of public place I would completely space out and get really tired and anaware of what was going on around me. It took me ages to link it to flourescent light bulbs. Here in australia they are phasing out incandescent light bulbs to be replaced by CFL flourescents by 2010. I wonder what sort of burden all that mercury in landfills is going to create!!!