Good Day, I have been trying to find a replacement for my 3 motion sensor light PIR lenses. But Have had no luck. I read about using the milk carton plastic and this seems to be the only option I have unless replacing all 3 at $70 each. Any ideas or solutions would be appreciated. Thank you

  • a milk carton won't have the proper lensing patterns in the plastic. it will work, but range/consistency will be less than ideal. better to pull plastic from a busted motion detector that has the grooves needed to build up local contrast and allow good operation.
    – dandavis
    Jan 8 '20 at 17:19

I've had the same problem and I don't like buying a new sensor for want of a $0.01 piece of plastic. Yes, I've found that a piece cut from a milk jug seems to work perfectly for me.

  • I've also used the milk jug plastic, low fat.. LOL, for motion sensors. The original lenses cracked way to soon in this Florida sun.+
    – JACK
    Jan 6 '20 at 21:10

It appears Allen & Roth is a "house brand" of Lowes, meaning Lowes buyers visit Shenzhen and go around to Chinese makers and wheel and deal to get things like this made as a limited run. However in their defense, they make the manufacturer build to US safety standards and secure a UL listing ETL listing for the item. Because US retailers are required to do that.

You are correct, that for a Code legal repair, you are out of luck since no service or parts are available. That's the downside of the nice price.

The milk jug hack is probably as good as you're going to do. I suppose if you care about the aesthetic, you could try to hunt the lens down on Alibaba/AliExpress, with the caution not to buy anything else mains-powered from that junkstream because it's unsafe. UL ETL cleared that PIR lens, because it's their job to protect you from unsafe junk, not unreliable junk.


I’ve found that a cheap £1 clear plastic measuring jug works a treat once measured and cut with scissors

  • 3
    Can you elaborate on this answer? What kind of measuring jug, etc?
    – gnicko
    Nov 4 '21 at 0:41
  • Pouring jug for milk
    – Complin
    Nov 5 '21 at 9:13
  • No clue man. This could be a good answer with more detail, a quick procedure, and maybe a pic.
    – gnicko
    Nov 5 '21 at 14:25
  • I will take a picture of it in daylight tommorow
    – Complin
    Nov 6 '21 at 16:31
  • 1
    @Complin It is now a month later. Could you please expand this answer with edit and your photo ?
    – Criggie
    Dec 6 '21 at 1:28

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