This light sensor switch circuit allows the automatic connection of a lamp when the light is low (at nightfall) and will maintain the lamp ON for a certain period of time. This time can be adjusted ...

Cyclists can already choose between plenty of cheap spoke-mounted LEDs that turn their bike wheels into highly-visible "rings of light" while they're turning. California-based startup ...

The patent describes a light sensor behind the display (like the ambient light sensor on today’s Apple Watches).