This 12 pack of compact fluorescent bulbs are Energy Star approved for a long lasting energy saving life and replace 60 watt bulbs while using only 13 watts. Compact fluorescent light bulbs (CFLs) are very energy efficient. CFLs use 75% less energy and last up to 13 times longer than standard incandescent bulbs. These bulbs contain less hazardous materials than standard bulbs. The reduced levels of harmful materials in these bulbs means less hazardous waste and fewer toxins leak into the soil and poison the environment when disposed of in landfills.