Bro smoke films available in the local market vary in quality. Retailers will smoke your lights for free depending on what all you buy from em and some will charge around 1000-2000 for both lights.
There are films with textured and sparkled finishes (which i personally feel look very tacky) and with passage of time begin to collect soap residue and become white.
Check the pictures on our Facebook page for what we have. It's a smooth translucent finish which looks like new months after installation and comes off completely clean and glue free.
The cheaper films on removal leave a strong adhesive residue which has to be worked of the light. This can lead to scratches.
We charge upto 2500/tail light depending on the car. Headlight prices are upto 3500/light.
This price includes a 3M headlight restoration treatment where we clean and polish the light cover after which the smoke film is installed and edge sealed so that it doesn't come off.
This is a corolla we smoked just yesterday. Note the smooth oem like finish on the light

