False triggers usually mean the PIR or motion sensor is picking up the wrong area, the settings are too
sensitive, or the fitting has become unreliable. The first check is whether re-aiming and setup will
settle it, whether the fitting is better replaced on the current point, or whether the problem has turned
into wider fault-finding.
What this usually means
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The sensor may be aimed too wide or at the wrong target, catching the pavement, road, gate, planting
or neighbouring movement instead of just your entrance or path.
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Sensitivity, timer or dusk settings may be too aggressive, so ordinary evening changes keep waking the
light up.
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Moving shadows, reflective surfaces, pets and passing traffic can all cause nuisance triggering when
the detection zone is too broad.
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On older fittings, erratic behaviour can also point to weather exposure, water ingress or a tired
sensor head.
What can change the next step
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If the fitting is cracked, loose, full of condensation or badly placed, replacement may be more
sensible than repeated adjustment.
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If the problem started after planting grew, a new gate was fitted, cars began parking differently or
another light was added nearby, a wider photo often shows why.
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If the false triggers come with flickering, tripping, dead periods or signs of heat, the job moves
from setup to fault-finding or remedial work.
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High mounting, awkward access or brittle old fittings can also change what is sensible to do in one
visit.
Official sources and further guidance
