Replacment Halogen Bulbs size MR11

Replace that burned out bulb, or keep a spare around just in case. MR11 is the most popular size for halogen bike lights from companies such as: Photon, Nite Hawk, Marwi, Viewpoint, Planet Bike, Niterider and many others. Please Note: Using the improper bulb may have adverse effects on your light system. NA-6VB for 6 volt systems Specify: 5, 6, 10, 12, or 15 watt.