Features Advanced TST LED Technology for industryleading performanceInternal cooling for superior reliabilityFully integrated design no wires or external driversDirect replacement bulb with compact fitment Backed by limited lifetime warranty Designed and engineered in USA Patents Pending Introducing the SL2 Pro LED Bulb As a replacement for the popular SL1 LED bulb the new SL2 Pro LED features some major upgrades nextgeneration TST LED technology an integrated topmount fan and a fullyintegrated wirefree design As a direct plugandplay replacement it provides a significant increase in output in a compact package NextGeneration TST Technology The SL2 Pro features new thermal separation technology TST LEDs TST LEDs are designed with electrical connections on the top which lowers thermal resistance allowing the SL2 Pro to run at higher power levels than traditional LED bulbs while maintaining focusCorrect Optical Focus The SL2 Pro LED bulb was engineered to focus light just like your original bulb matching the original beam pattern while providing an increase in total output Instead of using the smallest LEDs possible which can lead to streaks lines and harsh cutoffs the SL2 Pro was optimized to provide a smooth beam pattern while maintaining focus Internal Cooling The SL2 Pro features an integrated topmounted fan which provides maximum cooling efficiency superior thermal management and longterm reliability Since the fan is sealed inside the housing theres no concerns about damage from dust or moisture over time NOTE LED bulbs are legal in the USA for Fog Light use only Not compliant with DOT / FMVSS108 and not street legal in the USA for Headlights International legality varies by country