 There are different kinds of security lights that can be used
depending on the situations. To attract the attention of the passer-by, revolving lights
are adequate.
Security lights get switched on whenever it detects an intruder within its field of view.
Such systems may be based on PIR or Photosensitive sensors. A PIR may be connected to
normal lights to make security lights (requires technical knowledge). Security lights are
very useful to scare the intruders specially if these lights are employed in the compound
or on the roof tops. When the lights are switched ON, the intruder feels that he has been
detected and the owner is trying to confirm this. Normally this will deter the intruder
for making any further attempt.
 For safety and
security of homes and offices specially when there is no one in the house automatic/timer
based lights are very helpful. Such lights are automatically switched on after a
predefined time. Normally, it is feasible to program these lights to switch ON or OFF at
any particular time. However, if the house is going to be alone for a long time then a
thief can see that the lights are switched on or off at the time same time every day
(provided he is keeping a vigil over days). This may arise his suspicion and such a light
may not be useful in such situations.
 The advanced
versions of security lights allow for setting up daily on/off a times for upto one week.
This implies that you can vary a time for each day of a week when the lights can be
switched on or off. With such an arrangement a person who is observing from outside the
house will be under an impression that someone is in the house. Some of the advanced
versions can switch on or off multiple electrical items e.g. it can switch on a TV as well
as a light in room at night.
Another version switches the Lights ON and OFF at random.
 The Telephone
activated lights will switch ON/OFF by ringing the telephone in a particular sequence.
Such lights allow that the owner can switch ON/OFF lights from a remote location using
telephone lines. Such lights are not easily available in the market.
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