Halogen to LED Headlights?

Unfortunately, I have encountered numerous vehicles that had aftermarket LED bulbs installed. You might have encountered them too. They're the vehicles at night that you meet on the road with bright white headlights that seem to be on high beams, but they're not. They are LED bulbs that are not DOT approved or the headlights were not re-aimed; or both.
Please don't be one of those vehicles.