Step 1: Lighting
One of the only drawbacks to these light bulbs is the fact that they contain mercury. Though this is true, there is only and average of 4 milligrams of mercury in each bulb which is a very minuscule amount, and as long as the bulbs are intact they will not release mercury in to your home.
These particular bulbs are 26 watts that are equivalent to 100 watts of incandescent bulbs and last 5 years.
Another way to light your home is using natural sunlight through windows and skylights. Skylights can be very useful for high traffic areas or rooms that tend to be very dark. Instead of putting up a light fixture you may want to consider a skylight.