Very easy. Almost wasn't going to make a DIY but figured someone may want to read it.
Again, it is very simple.
You can order these off Amazon or from Lamin-X themselves. I found it to be the same pricing but I love Amazon and I use Amazon Prime so I purchased through Amazon.
You can pick up an entire front end film kit for headlights and fogs. They let you choose between clear protective, light tint, smoke, and yellow... maybe blue too. You can choose smoked headlights and yellow fogs if youd like even. They also have rear set ups for the tails and reflectors.
Package comes with film ONLY. I ended up not using the decal applier from Otterbox or the lens cleaner they recommended.
I just cleaned the surface with a towel and some water. Peel the backing off and apply.
I found it easiest to line up the outside bottom of the film so when you are standing you can see that edge is perfect. The slight gap it leaves at the top wont be visible. I also found it seems to be pretty pliable. You can peel it off and reapply many times and it has a bit of stretch.
For larger applications they suggest misting the sticky side ONCE which will prevent less air bubbles.
The difference is far more drastic when the lights are off. Turning them on looks pretty stock in my opinion. Yellow bulbs would change that.
I absolutely love the crisp cut off on Acura HIDs. Still to this day fabricators are making TL HIDs retrofit into their civic, integra, prelude, etc. The fogs have a pretty crisp cut off as well in my opinion.
In all, foglight film cost was 14.95$
Full kits are around 54.95$