expired Posted by Meowssi | Staff • Feb 4, 2025
Feb 4, 2025 1:24 AM
Item 1 of 1
expired Posted by Meowssi | Staff • Feb 4, 2025
Feb 4, 2025 1:24 AM
6-Pack Uigos Plug-in LED Night Light w/ Dusk to Dawn Sensor
$6.00
$13
53% offAmazon
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Consume more power OFF than ON
Reviewed in the United States on December 4, 2023
I tested these with a multimeter and discovered that the electric current increased when the light turned off, rather than dropping to near 0, as I expected it would. Curious, I took one of the night lights apart and realized that in order to save some money on parts, they had simplified the design, consuming power in a dummy component when the light was supposed to be OFF rather than actually switching off the circuit. The ad suggests that the night light saves energy and only costs 20 cents to operate each year, but based on my measurements, it is more like several dollars per light. I am giving this product one star for a "bad" energy design, as it would have literally cost purchaser less to operate if the night light simply never turned off.
This product claims "Max 0.5W" but it's actual wattage is over 1W.
Actual wattage is 1.104W (9.2mA) when light is on and 1.128W (9.4mA) when light is off. This means electricity is re-routed to a circuit that wastes energy when it senses brightness. Apparently, this way costs less for the manufacturer. So, CAUTION: this night light does NOT save energy when the light is off.
If you leave one of these night lights plugged in all the time, annual electricity consumption will be about 9.78KWH (1.116W x 24h/day x 365days), not about 2.19KWH (0.5W x 12h/day x 365days).
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if you are planning to keep one in the bathroom, make sure to check where your shadow lands. I had to remove from the bathroom because the shadow on the blinds was not pretty
I don't like that they are too bright for sleeping in the bedrooms and no battery backup for power outages. But I knew that before buying. I haven't looked for anything that offers those features yet.
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Actual wattage is 1.104W (9.2mA) when light is on and 1.128W (9.4mA) when light is off. This means electricity is re-routed to a circuit that wastes energy when it senses brightness. Apparently, this way costs less for the manufacturer. So, CAUTION: this night light does NOT save energy when the light is off.
If you leave one of these night lights plugged in all the time, annual electricity consumption will be about 9.78KWH (1.116W x 24h/day x 365days), not about 2.19KWH (0.5W x 12h/day x 365days).
To add a little more math for folks based on the above.
9.78KWH X $0.1654 per KWH - $1.62 annually.
Or $9.71 annually for the entire pack.
I purchased mine Jan 21, 2024 if that helps, house is still standing - miracles never cease.
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Our community has rated this post as helpful. If you agree, why not thank sternCD
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I purchased mine Jan 21, 2024 if that helps, house is still standing - miracles never cease.
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