This is one of our most complex questions. The key factor is your motorcycle's stator output. This number is crucial but can be hard to find. You can check the Baja Designs output chart on our website, available on each light product page. This chart covers the most popular models. Additionally, forums like ThumperTalk are good resources for this information. Using lights that draw more power than your stator can provide will quickly deplete your battery and could lead to stator failure.