The CFL Triple 4-Pin uses Amalgam technology – a mercury alloy and replacement for traditional liquid and pellet-dosed mercury. The CFLs deliver a wide operating temperature range up to 110 degrees C, 5 styles, 3 color temperatures, and average life of 10,000 hours. They fit into recessed downlights, ceiling fixtures, and wall sconces for residential, hospitality, industrial, retail, and commercial applications.