Description
This is a dusk to dawn photocell sensor, a slim black control unit with one small round lens set into a corner of the face. It reads the ambient light falling on that lens and switches the lighting circuit it controls on as daylight fades in the evening, then off again when the light comes back in the morning. The pack also states an adjustable time control, with settings of 1, 3, 5, 7 or 12 hours, so rather than running all the way through to sunrise the circuit can be set to stay live for a fixed spell after dusk and then stop. The pack states that it is rated IP44 and suitable for indoor and outdoor use.
That IP44 rating is the part worth thinking about before you buy. It means the casing is protected against water spray, which covers a porch, a covered entrance, an outbuilding or a garden wall, and it earns the unit a place in bathroom zones 1 and 2, though not zone 0 inside the bath or shower itself. Indoors it suits a hallway, a stairwell or a shop window where lights should come on by themselves at the end of the day. It is a sensible buy for anyone who keeps forgetting the outside light, or who wants a house to look occupied while they are away.
Two practical points. First, this is a switch rather than a brightness control: the specification lists it as not dimmable, so it turns a circuit on and off and nothing more. Second, the manufacturer does not state a maximum switching load, so if you are wiring it to a run of several fittings it is worth having a qualified electrician confirm the total. It arrives as one photocell per pack, and the minimum order is one.
Specification
| Type |
Dusk to dawn photocell sensor |
| Finish |
Black |
| IP rating |
IP44 |
| Dimmable |
No |
| Sold as |
1 photocell per pack |
| Minimum order |
1, sold in multiples of 1 |
Frequently Asked
What does a photocell like this actually do?
It senses the ambient light around its lens and switches the lighting circuit it controls on when the light drops at dusk, then off again once daylight returns.
How long can I set the lights to stay on for?
The pack states an adjustable time control with settings of 1, 3, 5, 7 or 12 hours, so the circuit can run for a fixed spell after dusk instead of all night.
Can I use it outside, or in a bathroom?
Yes. It is rated IP44, which the pack describes as protected from water spray, and the specification allows use in bathroom zones 1 and 2 but not zone 0.
Is it dimmable?
No. The specification lists it as not dimmable, so treat it as an automatic on and off switch rather than any kind of brightness control.
How many fittings can it switch?
The manufacturer does not state a maximum switching load, so have a qualified electrician confirm the total wattage of the circuit before wiring several fittings to one unit.
Where should the unit be positioned?
Because it works by reading natural light, the lens needs a position where daylight reaches it rather than one washed by the lamps it is controlling.