Burglar Alarms

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.