Reliable lighting depends on stable mounts, appropriate wire size, circuit protection, grounds, routing, switching, and a plan for future accessories.
Weak brackets create vibration, while poor routing and grounds create intermittent faults. Separate universal harnesses can clutter the engine bay, overload connection points, and make future diagnosis unnecessarily difficult.
Map every light and accessory, calculate current demand, group circuits logically, choose the controller and protection, then route and label the system so it remains serviceable.