bayonette light fitting security timer?

[AA]

I have one of those electronic timers that plugs into a socket so I can set a lamp to come on at programmed times when I am out. I've realised a certain hall light gives a great impression of someone being in by the way it throws light to other rooms. I'm sure I once came across a timer that fits between the bayonette ceiling fitting and the actual bulb - maybe in a catalogue - but I can't find it again. Problem is with my terminology. Anyone know what I mean and/or have recommendations? A table lamp in the hall plugged into my current socket timer doesn't have the same effect as the ceiling light. Thanks in advance AA

[Steve]

I use one of these type of things

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but its not a true timer, just a dusk-dawn setup, that doesn't work so well in hallways that are quite dark anyway, and tends to turn itsself on at odd times.

Steve

[Lobster]

Don't know about that; however I'm sure you can get replacement light switches with built-in timers such as you need.

Not sure if this is one of them as the description is worse than useless, however you get the idea:

David

[Harry Bloomfield]

A friend once showed me a light switch he had replaced with a gadget which simulated occupation by switching a light on and off at irregular times for an unpredictable amount of on time. This might be what you need?