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Southern Alberta Canada | Personally I'd go straight ahead with both, they shine down and toward the right automatically when switched to low. And don't worry about loaded/unloaded, on a heavy truck they are long enought to not make much of a difference. When loaded properly the whole unit may settle an inch. When meeting traffic on the highway with lights set straight ahead you don't see one shining more then the other.
The reason I like to tweak headlights on the road or in a field is to get maximum range, usually it's just down from straight against a wall. | |
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Adjusting headlights on semi trucks
