Kingbright KP-2012P3C Phototransistor 0805

LED - Light Emitting Diode - a small light source

LENS - An optical element which converges or diverges light

UK - United Kingdom - An island nation in Europe

water - A chemical substance. Chemical formula H2O.

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

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