Headlights are consistently dim and orangey

I would probably proceed straight to using a pair of backprobes to measure the voltage right at the headlight bulb socket while the headlight bulb is present and operating, and let that result guide next testing steps.

 

The generation 3 has a headlight harness problem that may be the cause of some of your problem led headlights will make hella difference I had on both gen3 20 and 13 huge difference . You need to crank the adjusters down about eight half turns then your cut off will appear set that at height .

 

LED low beam headlights make a big difference. Try it and see for yourself.

 

If backprobes reveal a low voltage at the operating headlight bulb while the car is READY, that could indicate a wiring issue needing to be corrected, which might affect LED retrofit bulbs as well. (Such a wiring issue would be the opposite of the one Tombukt2 is remembering, which resulted in a service bulletin; in those cars, the voltage getting to the bulbs was too high, and burned them out quickly.)

The only measurement worth taking is with the bulb present (i.e. the wiring under load) with the car in READY. The open-circuit voltage with the bulb removed doesn't tell you enough, because the voltage drop under load is actually a design parameter in that circuit (as that old service-bulletin issue demonstrated).

 

You might want to scan the package closely for an actual voltage rating; there might be one like this:



Still, your measured voltage appears to be above it, and also about half a volt lower than what I measured in my 2010 (which has the notorious eats_low_beams property):



The fix that Toyota distributed for the eats_low_beams cars was a harness extension built to drop an extra half volt or so—which would mean the voltage you're seeing is (a) probably about what Toyota intended, and (b) above your bulb's likely design voltage (unless yours is quite different when you check the package).

If those things are true, then it would seem you are already getting light that is brighter and bluer than what your bulb would produce at its rated voltage, and the question would shift to why it looks dim and orangey to you, like, what are you comparing it to?

Anyway, as your voltage seems to check out ok, there's no reason not to try an LED retrofit bulb, as Brian1954 suggested, and see if you like that better. (Ok, no reason other than the not-street-legal-in-USA one, anyway.)