Burned out a bulb on one of my el-cheapo driving lights form walmart the other day. (The chrome ones that mimic the Kury ones.) The bulb is an M16 type. Commonly used in landscape, and track lighting. Available at most hardware stores. ( called all my part stores first

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Also available online at a bunch of places in several different flavors, Spot, Narrow spot, Flood, Narrow Flood. I'm sure someone here already knew this, but just figured I put this up as useless information. Ride Safe