The $15 Philips Dusk-to-Dawn frosted bulbs have a sensor to detect sunlight

[Windows Central]

A dusk-to-dawn sensor sounds like a bright idea.
Three Philips Dusk-to-Dawn A19 frosted soft white light bulbs are down to $15.10 total on Amazon. This 3-pack normally sells for around $24 and often goes as high as $27. The drop to $15 is the lowest we have ever seen.

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