Why would light switch manufacturers write the words on and off on their switches? Is it not obvious if the light is on or off? - Quora

Why do light switches traditionally have up as on and down as off? Is there any rationale behind this? - Quora

Can a light switch be used as a disconnect switch? - Quora

How to know if I installed a light switch correctly - Quora

I flipped my light switch in and it made a crackle noise and the light flickered. What causes this? - Quora

What is the difference between a switch and a regular electrical outlet? - Quora

What is it called when 2 light switches control 1 light? - Quora

Why do most light switches point up when the light is on and point down when the light is off? - Quora

What is it called when 2 light switches control 1 light? - Quora

Why would light switch manufacturers write the words on and off on their switches? Is it not obvious if the light is on or off? - Quora