Compro CO/BL/90/A/024/15F Multifunction LED Beacon Amber 3W

LED - Light Emitting Diode - a small light source

LENS - An optical element which converges or diverges light

Amber - Fosilised tree resin appreciated for its colour

Amber - A yellowy orange colour

Railways - A set of tracks that have been laid for the purpose of trains to travel up and down them

Size - is the measurement of how big an object is in space.

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

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