1) Photography equipment
Found on
https://www.crosswordclues.com/clue/safelight
A safelight is a light source suitable for use in a photographic darkroom. It provides illumination only from parts of the visible spectrum to which the photographic material in use is nearly, or completely insensitive. ==Design== A safelight usually consists of an ordinary light bulb in a housing closed off by a coloured filter, but sometimes a s...
Found on
http://en.wikipedia.org/wiki/Safelight
A special darkroom lamp whose light is of colour and intensity that will not affect light-sensitive photographic material. Not all such material can be handled under a safelight, and some required a type designed specifically for them. An enclosed darkroom lamp fitted with a filter to screen out light rays to which film and paper are sensitive. Lig...
Found on
http://www.rodsmith.org.uk/photographic%20glossary/rods%20photographic%20gl
Orange or red light used in a darkroom.Gives out light of a wavelength to which photographics paper is relatively insensitive. Safelights are not actually safe. Leave paper exposed to a ' safe ' light close enough or for long enough and the paper will fog.
Found on
http://www.silverlight.co.uk/resources/glossarynz.html
Darkroom lighting, allowing safe handling of light sensitive materials (e.g. deep red for B&W paper).
Found on
https://www.encyclo.co.uk/local/20176
No exact match found.
