LED
LED is a tiny light that glows when power flows through it, using far less energy than a regular bulb.
A small funnel guides water straight into a glass — no spills, no waste. A wide-open bucket poured from above loses water on all sides before any fills the glass. An LED works the same way. It channels power directly into light, while a regular bulb spills most of its energy as heat.
Explaining led by grade level
When you push a lemon battery's power into a small LED, it glows. The LED does not get hot like a lamp bulb. It turns power into light, not heat. That is why it needs so little energy to shine.
Projects that explore led
An LED needs very little current to glow. With the right combination, four potatoes wired together can produce enough current to light two low-power LEDs. That result shows how little energy an LED requires compared to a regular bulb.
An LED uses far less energy than a regular bulb to produce the same brightness. When you place a lux meter one meter from each bulb and measure, the difference becomes clear. A 7.5-watt LED matched a 60-watt incandescent at roughly 785 lux — needing only one-eighth the power to hit the same reading.