Sigma 17235 Micro Black / Red Rear Bicycle Light

LED - Light Emitting Diode - a small light source

Black - A colour which does not emit any colour of the spectrum. Black absorbs all frequencies of the spectrum.

Helmet - A form of protection worn on the head to prevent injury

Students - A group of humans who are still in full time education

Dark - A colour which absorbs visable ligt so apears less light than objects that reflect light

Red - One of the three primary colours

Safety - prevents damage being caused.

Velcro - a combination of hairs and hooks to attach two surfaces together.

Small - something that takes up less space than normal.

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

Permanent - Something that is long term and most likely to be around forever.

Practical - Weather a task is easy to carry out and realistically succeed.

Ideal - Something that satisfies a perfect criteria.

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