There's been lots of discussions about exactly what the legal limit is.
<------ See my avatar for 35% all round
Most agree that this 35% is the max, at least on the driver and passenger side windows.
Many members use a company called Tint-R in Nottingham
See [url="http://www.lexusownersclub.co.uk/forum/index.php?act=ST&f=31&t=2718&hl=tintr&s="]HERE[/url]
As regards posting piccys of your car, follow this link and choose [b][add photos][/b] at the top right of the
page.
See [url="http://www.lexusownersclub.com/gallery/album01"]IS200 Gallery HERE[/url]