Concept Series LED Performance Bulbs. Get both a sleek look and improved visibility for safer driving at night with these powerful LED bulbs. With a combined output of 6,000 lumens, these bulbs easily outperform halogen bulbs and even the average quality LED bulbs on the market. Our patented, integrated heat sink design is a breakthrough for headlight and fog light conversions which brings a real Plug & Play experience to users. Converting to LED is as easy as replacing a stock bulb.