1.This series track light is a built-in driver design, and it is completely different from the common built-in driver track light on the market. 2.The superior heat dissipation of cold-forging integratedheat sink, equipped with high temperature resistant TC100 Tridonic driver (This driver’s TC temperature <100°C which can ensure 50000hrs well working ), thus the lamp’s lifespan won’t be affected by the driver built in, achieving a real 5 years warranty.