E-Lux (96% positive feedback lifetime) via Amazon offers a few motion sensor lights on sale. You can pick up a single 5W LED Motion Sensing Light Bulb for $7.80 Prime shipped when code P4K9IACH is used at checkout. Regularly closer to $12, this is the lowest we’ve tracked and the best available. Instead of putting new light switches in or replacing entire fixtures, just add this motion-sensing light bulb and save tons. Rated 4/5 stars.

Nomad Base Station

This bulb is also available in a 2-pack for $12.99 Prime shipped with code IJ2PQZLZ. Regularly closer to $19, this is also the best we’ve tracked and the lowest available.

LED Motion Sensing Light Bulb features:

The dusk dawn light bulb is radar sensor bulb, it’s much more sensitive,more responsive and more penetrating than infrared sensor lights bulbs. The led motion sensor light bulbs can penetrate the glass, veneer and walls 360°angle to detect motion within range φ15-26ft, install height is 9-17ft

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