Security floodlight onto street

[biblio]

I wondered if there any general quidelines regulating the placing of PIR type floodlights (switched by movement), or the sensor type (switched by onset of darkness) to the front of a house which faces the street and almost directly over the pavement. I am interested in a product by Micromark (MM4900) in a BDC catalogue (p254) with a 100 watt Halogen on PIR, integrated with a 9 watt PL-S mini fluorescent on darkness sensing. I plan to wire a switched FCU into a ring main, and spur off a 1.5mm radial cable with say a 10amp fuse. I would angle the light acutely downwards from about 20ft height under the eaves. I have had three tyres on my car vandalised irreparably this week. The local Police tell me there are no laws prohibiting such a light, other than the obvious possibility of nuisance from a very bright lamp eg.