Here is some information I found about green lighting. It can make a difference, if you haven’t done it already.
Green Lighting: By the Numbers· 10 percent: The percentage of global electricity saved by switching to entirely efficient lighting systems, according to a report published by the International Energy Agency (IEA). The carbon dioxide emissions saved by such a switch would dwarf cuts so far achieved by adopting wind and solar power.
· 19 percent: The percentage of global electricity generation taken for lighting-- that's more than is produced by hydro or nuclear stations and about the same that's produced from natural gas."
· 40 percent: the increase in sales in stores with good natural light. (the Heschong Mahone Group)
· 25-33 percent: The percentage of total requirements to receive a LEED Silver rating, that builder can achieve through the use of day lighting in their design.· 2.5 million: The number of homes that could be lit from the energy saved if every American replacing one light bulb with an Energy Star rated one; this action would also prevent emissions of greenhouse gases equivalent to the emissions of nearly 800,000 cars.