"This Bulbrite 509512 CF13CW/LM/4PK cool white compact fluorescent T2 coil bulb when compared to the standard CFLs has 50% less mercury. This product also lasts up to 8 times longer than incandescents. In addition, it is TCLP compliant and Energy Star rated. Applications include chandelier, outdoor residential, pendant/downlights, portable lighting, track, wall mount, and sconce. Sold in packs of 4 bulbs."