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I've just moved into a house which has a secuirty light. It's off during the day and it comes on frequently during the night even when there's seemingly no motion outside.

I'd like to be able to disable it, but the switch which controls it only seems to have two settings: constantly on, and sensor triggered. I want to know how to set it into a mode where it stays off until I turn it on with the switch.

Edit: Apologies for not being more clear about the switch. It's just a wall switch inside the house. There's two switches on it, but one controls a light inside the house. The other is simple an on/off type switch you'd normally use to control a normal light in the house. In the down position, the light is permanently on. In the up position, the light is in sensor mode.

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    So, there's a switch on the side of the light which controls its mode. Is there a separate wall switch that applies and removes power to the whole light? If not, how will you control it? – Daniel Griscom May 11 '16 at 12:04
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    Can you add a photo of the switch you're toggling? – Tester101 May 11 '16 at 14:02
  • Sorry for not being clear. Please see my edit to the original question. – Sam May 14 '16 at 15:50
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It sounds as if the light is being controlled by a single 3-way switch. The hot lead is run to the common and two switched hots are run to the traveller terminals.

You could create a master switch by adding a single pole switch that interrupts the hot lead before it goes to the 3-way. You could expand the box holding the switch to a 2-gang type and wire the new switch with the existing hot lead and a short pigtail from its second terminal to the 3-way common.

You also could do the same with a double switch in the existing single gang box. Either a single pole/3-way combination or even a 3-way/3-way combination would work.

double switch

In this case, the pigtail runs from one terminal of the master switch (the single pole switch) to the common terminal of the 3-way. if you are using a dual 3-way, just leave one of the traveler terminals unused.

In either case, the white (neutral) and ground leads are left connected, just adding a pigtail from the grounds to the new switch.

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    I don't see anything that sounds like a 3-way - just a mode switch on the device would be my reading of the question. Sounds like it just plain needs a normal single-pole switch installed. – Ecnerwal May 11 '16 at 13:44
  • @Ecnerwal He makes it sound like he throws it one way and it is on, and the other way it is also on, but in a different mode. That says that the switch is a double throw with two switched hots. That would make it a three way. Unless it is a non-standard switch, but I don't see any indication of that. – bib May 11 '16 at 13:54
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    It sounds more like he's talking about a mode select switch on the device, but it's not very clear. – Tester101 May 11 '16 at 14:01

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