Lumen second
Okay, imagine you are holding a flashlight and you turn it on. You see a beam of light shining out of it, right?
Now, imagine that instead of just the beam of light, you also count how much light energy is coming out of the flashlight in that one second. That's what we call a lumen second.
Lumens are a way to measure how bright a light source is. Just like how pounds are a way to measure how heavy something is.
But, a lumen second isn't just about how bright a light is. It's about how much light energy is being produced over time.
So, if you use a flashlight that's producing more lumens for one second, it would have a higher lumen second value than a flashlight that's producing fewer lumens for the same amount of time.
Finally, scientists and engineers use lumen seconds to help them design and measure light sources like light bulbs and LEDs. They want to make sure they're producing enough light energy over time to be useful for people to see and do things in the dark!
Now, imagine that instead of just the beam of light, you also count how much light energy is coming out of the flashlight in that one second. That's what we call a lumen second.
Lumens are a way to measure how bright a light source is. Just like how pounds are a way to measure how heavy something is.
But, a lumen second isn't just about how bright a light is. It's about how much light energy is being produced over time.
So, if you use a flashlight that's producing more lumens for one second, it would have a higher lumen second value than a flashlight that's producing fewer lumens for the same amount of time.
Finally, scientists and engineers use lumen seconds to help them design and measure light sources like light bulbs and LEDs. They want to make sure they're producing enough light energy over time to be useful for people to see and do things in the dark!