How to Tell if Light Switches are On or Off

Different Types of Light Switches

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

How to Tell if Light Switches are On or Off

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

Light Switch Not Working? Try This.

Quick Tip #16 - Three-Way, Two-Way or One-Way Switch?

How to Install Smart Light Switch: 2024 New Guide

How to Replace a Light Switch - Bob Vila

Light Will Not Turn Off With Wall Switch

Please Turn Off Lights When Leaving Room Empty Sign, SKU: S2-0367

Why does my tester not indicate voltage when a light switch is on? - Home Improvement Stack Exchange