3 things - the light level at which they start working, the time for which they remain on (typically 20 seconds to 10 minutes) and sometimes the sensitivity or range over which they work (typically 4 to 12 metres). They are usually physically adjustable, so that they can be pointed more downwards, to redThere are two things intruders don't like - loud noise and bright light. The former makes it difficult for them to hear approaching people, and makes a compelling case for the fitting of internal sirens (sound bombs) in alarm systems. This however is a topic for another day. The latter means they can be easily seen and is possibly the most effective deterrent. Security lighting can be used in conjunction with CCTV to give better pictures.

Security lighting can be used inside and out, and everything said here applies to either. Remember though, that outside lights must be rated for outdoor use, although there is nothing to stop you using them indoors as well. Many premises leave lights on all night. If you do this make sure that low energy lighting, such as fluorescent or sodium lighting is used, otherwise there will be large electricity consumption.

PIR Switched Lighting

A PIR or passive infra red detector, switches on when body heat movement is detected. Thus it will detect humans, but also animals such as cats upwards. The most popular form of security lighting has a built in PIR, which switches on the light if some-one approaches after dark. PIRs can commonly be adjusted for 3 things - the light level at which they start working, the time for which they remain on (typically 20 seconds to 10 minutes) and sometimes the sensitivity or range over which they work (typically 4 to 12 metres). They are usually physically adjustable, so that they can be pointed more downwards, to redu

easily seen and is possibly the most effective deterrent. Security lighting can be used in conjunction with CCTV to give better pictures.

Security lighting can be used inside and out, and everything said here applies to either. Remember though, that outside lights must be rated for outdoor use, although there is nothing to stop you using them indoors as well. Many premises leave lights on all night. If you do this make sure that low energy lighting, such as fluorescent or sodium lighting is used, otherwise there will be large electricity consumption.

PIR Switched Lighting

A PIR or passive infra red detector, switches on when body heat movement is detected. Thus it will detect humans, but also animals such as cats upwards. The most popular form of security lighting has a built in PIR, which switches on the light if some-one approaches after dark. PIRs can commonly be adjusted for 3 things - the light level at which they start working, the time for which they remain on (typically 20 seconds to 10 minutes) and sometimes the sensitivity or range over which they work (typically 4 to 12 metres). They are usually physically adjustable, so that they can be pointed more downwards, to red

hough there is nothing to stop you using them indoors as well. Many premises leave lights on all night. If you do this make sure that low energy lighting, such as fluorescent or sodium lighting is used, otherwise there will be large electricity consumption.

PIR Switched Lighting

A PIR or passive infra red detector, switches on when body heat movement is detected. Thus it will detect humans, but also animals such as cats upwards. The most popular form of security lighting has a built in PIR, which switches on the light if some-one approaches after dark. PIRs can commonly be adjusted for 3 things - the light level at which they start working, the time for which they remain on (typically 20 seconds to 10 minutes) and sometimes the sensitivity or range over which they work (typically 4 to 12 metres). They are usually physically adjustable, so that they can be pointed more downwards, to red

or passive infra red detector, switches on when body heat movement is detected. Thus it will detect humans, but also animals such as cats upwards. The most popular form of security lighting has a built in PIR, which switches on the light if some-one approaches after dark. PIRs can commonly be adjusted for 3 things - the light level at which they start working, the time for which they remain on (typically 20 seconds to 10 minutes) and sometimes the sensitivity or range over which they work (typically 4 to 12 metres). They are usually physically adjustable, so that they can be pointed more downwards, to red 3 things - the light level at which they start working, the time for which they remain on (typically 20 seconds to 10 minutes) and sometimes the sensitivity or range over which they work (typically 4 to 12 metres). They are usually physically adjustable, so that they can be pointed more downwards, to reduce the range, and sideways to give cover over particular areas. They are more sensitive when the person approaches across their detection area, than straight towards them. When choosing a location, they should be at least 2.5m above ground, so they are not easily tampered with, well away from any heat source, such as a central heating exhaust and their detection area should not include a road at the end of the property. Many PIRs have an over-ride facility, so that the light can be switched on for up to 8 hours continuously. Halogen floodlights, ranging from 150 to 500 or sometimes 1000W, are the most common security lights using PIRs, but other types of light fittings are also available. Low energy bulbs are best avoided, because some do not last long and may reduce the life of the PIR, and they don't reach full brightness immediately, which is desirable in a security light. Floodlights can cause annoyance to neighbours, if they shine onto their property, especially through windows, so their sighting and adjustment should bear this in mind. They can usually be adjusted independently of the PIR to keep them pointing down away from other peoples' property. PIR lights should be wired in via a switche