So I have a couple of floor lamps that have three-way switches and was designed for incandescent light bulbs. To clarify, when I say three-way switch, I mean it cycles between off, low, medium, and ...

I've given up on three-way light bulbs. This isn't a “green” decision, but one driven by frustration with poor design. When my 3-way bedside lamp (30-70-100-watts) didn't switch properly I tightened ...

A 6-V battery powers a circuit with parallel branches on a board. Several wires and light bulbs plug into the board to make various series and parallel circuits. The brightness of the bulbs changes ...

A parallel circuit is way of connecting components on separate branches, so the current can take different routes around the circuit. The current is different in different parts of a parallel circuit.

If you buy something from a Verge link, Vox Media may earn a commission. See our ethics statement. TP-Link has released three new smart Wi-Fi lightbulbs, and as with just about every smart product ...