Time To Rethink Sensor Switches?

Sensor switches used to be thought of as a big power saving measure but these days I’m less sure.

30 years ago when light bulbs were typically 100watts and had short lives a sensor like this could save some serious power and cost of bulbs.

These days with LED bulbs that are are put out a reasonable light output using less than 10 watts I am no so sure.

When checking out a replacement sensor switch I found the switch consumes 6 watts of power (More than the bulb I was using)

A simple time switch only uses around 1 watt.

So the equation for power use could be

Sensor switch 24 hours x 6 + say 5 watts when light on  = 150 watts per day

Time switch 24 hours per day x 1 + 5 watts for light on for say 10 hours = 74 watts (half the power usage)

 

Which way would you go?

 

 

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