An 18- watt CFL used in place of a 75-watt light bulb will cost about $45.00 less over the lifetime of the bulb.
You need to be aware that CFL bulbs have some negative qualities.
Energy Star estimates that you will save $30 in energy costs for every incandescent bulb you replace with a CFL.
The post office also works with the OSRAM SYLVANIA and Veolia Environmental Services to help customers recycle used CFL light bulbs.
The replacement compact fluorescent bulbs (CFL) use two-thirds less energy than traditional incandescent bulbs and burn much cooler as well.