Power consumption of PIR lamp on standby? [OT]

Discussion in 'DIY Computers' started by Lem, Jul 20, 2004.

  1. Lem

    Lem Guest

    I have one of those outdoor lamps which come on if the PIR senses
    motion.

    What sort of power consumption do these devices have when they are
    on standby?
     
    Lem, Jul 20, 2004
    #1
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  2. Lem

    GwG Guest

    Not sure about the actual wattage, but it can't be much, battery powered
    PIR's in alarm systems seem to last for over 12 months, so that should
    give you a rough idea.

    It amazes me how some people leave these lamps blazing away all day,
    without taking the trouble to adjust them, or even switch them off. Most
    of these are 500watt, which, if I am correct, is the like leaving a two
    bar electric fire on for 6 hours every day.
     
    GwG, Jul 20, 2004
    #2
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  3. Lem

    Graham H Guest

    Try asking in ........ free.uk.diy.home
     
    Graham H, Jul 20, 2004
    #3
  4. Lem

    Conor Guest

    Few hundred milliamps.
     
    Conor, Jul 20, 2004
    #4
  5. Lem

    Peter Duck Guest

    In message <>
    That would be many tens of watts, or at least volt-amps: I've an ancient
    one (so perhaps relatively inefficient) that draws 18 mA.

    That would be a mere 4.1 watts with an unlikely 'worst case' 100% power
    factor, but my only wattmeter can't measure true power around/below
    that.
     
    Peter Duck, Jul 20, 2004
    #5
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