Side-point: EV nerdies who worry about every electron being used in the car might worry about consuming "too much power" using high beams.
Knowing that hi and low beams use the same wattage for Tesla S (current generation) there is no savings to be had by suffering with low beams if you're low on range charge to make your destination. If it's dark, use the beams you need for the job at hand!
By the way, MS headlights have the best throw and brightness I've ever experienced in a car that I own. IMHO. Certainly one thing done right!