Just thought I'd chime in here and share my experience with LED headlights. After 4 different kits and a total over $400, not a single one remains on my car. The reason is simple, look at a halogen bulb (while off, unless you want to blind yourself
). The area from which the light originates, the filament, is a small narrow line. Now look at an LED headlight replacement, the light-producing surface area is much larger than a halogen filament, and typically only has two sides rather than infinite sides like a round bulb. The halogen light housing, whether projector or reflector, is designed to capture light from a halogen bulb, and therefore is focused on that one specific point where the filament is. Put an LED in there and while the overall amount of light produced may be more, the amount coming from the exact spot where the filament would reside is less, causing your headlights to lose intensity right in the center. This means the hot spot which provides the "punch" through darkness is no longer there, so distance is lost. Need proof? Here's some comparison pics from my 2015 Legacy. Though it has projector low beams, the results were the same with my reflector high beams and fogs.
Stock halogen, notice the bright spot in the center.
LED, while it may be bright notice the lack of intensity in the middle.
With different designs of LEDs you may be able to get a slightly better beam pattern than I did, but you will never achieve the same performance as a halogen bulb. If you want more light, look at PIAA NightTech. If it's whiter light you're after, Philips CrystalVision Ultra is what I run in my high beams and Hella 500FF driving lights. Color wise they're identical to factory HIDs. If that's not white enough, they have the DiamondVision which is the whitest halogen bulb I know of.
If you're willing to do a little work, the H11 to H9 mod for low beams, which I did on my brother's Impreza, will give you a 56% increase in raw lumen output. It can be done with just a file, but wire cutters and a dremel do speed up the process.
Here's a good comparison of bulbs:
So after wasting plenty of money away on LED headlights, my current setup is as follows:
Low beam: RX350 bi-xenon projector retrofit, Morimoto 4300k D2S bulbs
High beam: Philips CrystalVision Ultra
Fog light: Diode Dynamics Luxeon LED projector fogs https://www.diodedynamics.com/store/led-bulbs-1/assemblies.html
Hella 500: Philips CrystalVision Ultra
The LED fogs work fine as they're an entire replacement for the stock fog light housing. It's a sealed unit with 3 diodes and a parabolic lens designed specifically for those LEDs. There's nothing wrong with LEDs in automotive lighting when the optics are designed for them.
Hopefully some of you find this helpful and don't end up wasting money like I did