The Blast™ family of Curing Lights by First Medica™ takes advantage of third generation, high power LEDs (Light Emitting Diodes). Third generation light sources offer higher output, longer operating life and greater electrical and thermal efficiencies. These lights have a peak output very near the camphoroquinone (CQ) absorption maximum for high performance. Nearly all light-cured composite, cements and sealants are CQ based. LED light sources are designed to last the life of the unit and never need to be replaced.