TruOpto OSSR5164A 5mm Bright Red LED Pack Of 1000

LED - Light Emitting Diode - a small light source

LENS - An optical element which converges or diverges light

Diameter - A measurement across a circle passing through the middle

Red - One of the three primary colours

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

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