When installing aftermarket lights, avoiding common mistakes is key to ensuring safety, performance, and longevity. One frequent error is improper wiring, such as forcing connections or ignoring polarity, which can cause flickering or damage the lights. Another is incorrect alignment, where headlights are angled too high or low, reducing visibility and potentially blinding other drivers. Skipping steps like removing protective covers or securing the housing properly can lead to moisture buildup or vibration damage. Additionally, failing to verify vehicle compatibility before purchase often results in fitment issues or the need for modifications. Taking the time to follow instructions carefully, double-check connections, and adjust beams correctly will help you avoid these mistakes and get the most out of your aftermarket lights.