Case in point: an easy way to make your backyard, garage, or other outdoor spaces safer and more secure is with this four-pack of motion-activated, solar-powered LED lights that are already 43% off. A ...

A device that detects the amount of light in the vicinity. An ambient light sensor may be built into a smartphone or tablet to adjust the screen brightness based on the available light.

In a study published in the journal Advanced Science, the researchers have presented a light-activated high-performance sensor that can precisely detect oxygen in complex gas mixtures and also has ...