Stack light

A stack light is a special kind of light that has different colored lights all stacked on top of each other like a tower. These lights work together to help people understand what's happening in a big machine, factory or warehouse.

So, let's say that you're in a factory and you're working on a big machine. The machine has lots of different parts working together to make something. But sometimes, one of those parts might stop working, and it can be hard to tell what's wrong. This is where the stack light comes in.

The stack light will have different colors, like red, green, and yellow. Each color means something different. For example, green might mean that everything is working just fine. Yellow might mean that there's a problem, but it's not too serious yet. And red might mean that there's a big problem and you need to stop the machine immediately.

So, when you look at the stack light, you'll be able to see what color is on and understand what's happening with the machine. It's like the stack light is talking to you in a special way, telling you what you need to know. And that's why it's so important to have stack lights in big factories and warehouses. They help keep everything safe and working smoothly!