Thats for sure!
If a retrofit is an option, I'm 100% voting HID projector retrofit. Specifically, the D2S 4.0 [emoji1362]
It's not that simple. LED output is much whiter- and will APPEAR to be much "better" output- but throw distance usually lacks, and glare can be expected. Also, what halogen? Cheap replacements with stock wiring? I've seen some halogens that you can hardly even tell they were on from inside the vehicle- these are NOT properly working and powered halogens.
Here's some halogen vs drop in LED comparison-
See the light scatter?! See how much better hot spot the halogen has? Morimoto has been trying to release their LED projectors for months now, but the output is just not satisfactory, and they are therefore getting delayed.
Another picture-
This is supposed to be promoting an LED drop in! However, if you know much about headlights, you can see how bad the out put actually is.
See how scattered the LED is? See how nice the hot spot is on the halogen? Imagine if that halogen was a brighter lamp with more output! It would blow the LED away.
Example- H4 Extreme White H4 Halogen from PIAA-
Aaaand, another awesome LED output shot- this time from PIAA. Please tell me you see how bad the output is-
For the record- I LOVE LED lighting. I use LED lighting on my whole house, as well as everywhere I can on all my vehicles.
Headlights, however, is where LED technology is currently falling short.