I was under the impression that the low beams were LED on both trims.
Here is what Car & Driver says.
This is for a 2018 LT.

And here is from the 2018 brochure. The brochure also says the front reading lights and dome light are LED, on both trims.

I was under the impression that the low beams were LED on both trims.I just looked at my 2018 Premier - the non-projector beam headlamp is most certainly a Halogen. NOT a HID. I couldn’t see the other bulb.
According to what the manual and online Silvania says, both are halogen.
Seems the LED may have been a bit more efficient, but they did not fit them from the factory it seems. I didn’t see an option for that either (but certainly I could have missed it)
Mark