Kingbright L-424YDT 3mm 2.1V Yellow LED Cylindrical

LED - Light Emitting Diode - a small light source

Diameter - A measurement across a circle passing through the middle

Yellow - A primary colour. The sun is often described as yellow

Colour - The categorised spectrum of light visable to humans

LED - Light Emitting Diode. A bulb that is very efficient at producing light. Often small.

Reliable - Something that is consistently good and can be trusted.

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