
1) Mirrors
Found on
https://www.crosswordclues.com/clue/reflectors

Reflectors are objects that reflect light beams back to the source of that light, without re-emitting or changing the light itself. This reflecting back occurs because the reflector is designed to disperse or reflect the incident light in a particular way. In vehicles, reflectors are often used to increase the visibility of vehicles, cyclists or pe...
Found on
https://www.tralert.com/en/lighting-terms/reflector/

The shiny surfaces in the back of lanterns which help to intensify the beam.
Found on
http://www.encyclo.co.uk/visitor-contributions.php

Special reflective items - usually made out of hard plastic - which bounce light back towards its source. Red reflectors are used on the back of all vehicles.
Found on
https://www.encyclo.co.uk/local/20682

At night all cycles MUST have white front and red rear lights lit. It MUST also be fitted with a red rear reflector (and amber pedal reflectors, if manufactured after 1/10/85). These will help you to be seen by other road users.
Found on
https://www.encyclo.co.uk/local/22336
No exact match found.