I had the same problem. The sensor uses the load as a drain for the sensing
circuit. With filament bulbs, the current is too small to light them. Put a
small tungsten bulb in parallel. Experiment to find the smallest wattage
Note: Do not use CFLs. They produce EMI that trips the motion sensor.
On Tue, 5 Apr 2016 08:42:08 -0500, Mark Lloyd wrote:
The problem I had was inside. The sensor is in a wall 'box', and is
line-of-sight to the interior lights. CFL will come on okay, but constantly
re-triggers the sensor.
Outside installs usually block the light from load to sensor, because it
usually also contains an ambient light sensor to prevent daytime duty.
The one I described is outside. Maybe that explains the difference.
I do have some inside motion sensor lights. These depend on current flow
through the bulbs (2-wire switch) and will not work properly with CFL or
This is not the first time this topic has appared on this newsgroup.
Apparently the LED bulbs dont draw enough current to make the sensor
work properly. I would assume they now make motion sensor fixtures made
*FOR* LED lights, or there would be a lot of complaints and lack of
sales. But I'm only guessing this has been done (or will soon be done).
Until then, the older fixtures must have at least one "regular" bulb
I'm no fan of motion sensor lights. I think they waste a lot of
electricity. On my farm, they would turn on and off all the time. My
barn cats, wild critters, swaying trees from wind, rain and snow, and
everything else that moved, made them turn on. If I adjusted them to
less sensitive, then they did not turn on when I walked toward them
until I was real close, and still went on from animals and so on. I just
got rid of all of them over time.
I know where there is one in town that turns on everytime a car drives
past that building on the road, on a fairly busy street. Who needs that,
and why waste electricity like that....
Either way, I'm sure they must have some newer fixtures that work with
LED, and the older ones will need to be replaced, but no matter what, I
wont install them again. There is one place on my farm where I had to go
to the barn at night and would trip on steps, if I was not real careful
or had a flashlight. I solved that by putting a light on another
building ahead of the barn, with a switch outside (on the other
building), which lights up the place with the steps. But since then, I
bought a solar powered light which lights up that area every night. But
if it was a real cloudy day and the solar light did not charge up well,
I still have the switched light.
On Monday, April 4, 2016 at 11:50:30 PM UTC-4, Mike Duffy wrote:
Except that typically you can't just use the smallest wattage that works
because you need sufficient wattage for the lighting application. But
if you have 4 of them, you could put one 100W regular bult, three 100W LED.
How that looks, IDK in all cases, but I've done it with CFL, that can
have the same issue and it looked OK.
HomeOwnersHub.com is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here.
All logos and trade names are the property of their respective owners.