Subtle tint. It's the only picture I got! I ripped it off after a week as it started bubbling and peeling.
It's definitely a 2/3 man job. You need heat to bend the film around the curvature of the light, in both directions.
The reason mine went funny was because I applied it, then fitted them straight away. If you're doing it I'd recommend fitting the film as above, leaving it indoors overnight so the cold air doesn't 'harden' the film and crease it like mine did, then fit them the next day. I'd never do it again to a Clio though as it was a pain in the arse and a waste of £40. This was only because the lights are a s**t shape to work with.
It worked a lot better on my Impreza. Here is a pic on the rear lights - looks a lot more OEM because the lights are flat and easy to work with;