Simply by using one 13-Watt Compact Fluorescent in replacement of one 60-Watt light bulb, not only would you have prevented a significant amount of toxins from pouring into our environment, you will save money. A CFL bulb will end up costing less then the cost of replacing regular bulbs over the life span of the bulb. Advanced technology enables CFLs to use 75% less energy than a standard incandescent bulb and last up to 10 times longer. This means that over the life of one CFL, you can avoid replacing up to 13 incandescent bulbs! The super efficient performance of CFLs also means you can save at least $25.00 in energy costs over the life of each CFL that replaces an incandescent bulb.