Well thought-out lighting discourages intruders and gives the impression that good security is practised. Basic lights can be purchased and fitted at little cost, but consider:
cost effectiveness – different lights have varying set-up and running costs (some lights are more suitable for constant illumination, while others are better for combining with passive infrared detectors)
reliability and maintenance requirements
statutory requirements regarding light nuisance
CCTV systems (where fitted) will need sufficient light to be effective 24 hours a day
Lights can be activated by motion sensors or left switched on through the night, although studies have shown that a lower level of continual light is more effective as a deterrent than sudden, bright lights. A good compromise is to use high-efficiency, low-energy lighting controlled by a photo-electric cell (dusk to dawn switch). This type of light, sited out of reach (perhaps 10 foot above ground level), provides ample illumination, with few shadows and costs only a few pounds a year to run – despite it being left on throughout the night. You can find out more in the document ‘Lighting against crime’.