A spray-type car wash system includes an overhead carriage which can move longitudinally the length of a wash bay. A pair of laterally opposed spray arms depend from the carriage. During vehicle entry into the bay, LED-based lights running down the length of each arm are caused to flash to help the driver center a vehicle between the arms. Cushioning and breakaway features protect the arms from damage. A single-arm system is also disclosed. A double-light, stationary support system is also disclosed.