A bulb is a small, rounded object that produces light when an electric current passes through it. It is commonly used to provide illumination in lamps and other light fixtures. Full definition
A light bulb lit, and they realized that students placed according to their academic level online is needed for every child — not just students with disabilities. (nancyebailey.com)
So if you fancy having a few very basic smart bulbs in addition to the mad colours you're putting in other rooms, this is a cheap way to grab a couple. (t3.com)
They are planning to replace the current light fixtures with LED bulbs in the coming weeks. (treehugger.com)