EcoSmart 14 watt (60 watt equivalent)compact fluorescent bulbs uses 75% less energy than a standard 60w incandescent bulbs. The energy savings over the life of the 4 bulbs is up to $220 or $55 per bulb. The bulbs are a 5,000k daylight color and last up to 9 years each. EcoSmart bulbs use up to 70% less mercury than standard cfl's. EcoSmart cfl bulbs are energy star rated. Light bulb base type : Medium.