4 in Gravity(R) LED Fog Lights are powered by KC's patented Gravity(R) Reflective Diode (GRD) and optical reflectors to deliver an incredible 150 lx at 10m using only .74A per light. KC's patented Gravity(R) Reflective Diode system aims LEDs into precision reflectors capturing all light to project it forward.Die-Cast Aluminum HousingDie-Cast Mounting Bracket with hardwareOn-Board Thermal Management for Light EfficiencyDurable Optical Quality Glass LensSpot Beam Pattern Rally 400s feature a compact 4 in profile with a rugged steel housing makes these lights idea for front bumpers on trucks Jeeps and SUVs especially on vehicle locations with limited space. Different beam patterns offer advantages depending on your specific lighting needs.