Non motoring what is it used for

[Mike Hodgson]

Hopefully this one will be easier
Three oil lamps from the Victorian era ,all three were used for the same purpose,and that was ??

[Keith Bennett]

Collectors' moth traps?

[scotty]

Photographic safe lights used whenever working with un-fixed paper in a darkroom. Now I enlarged picture to see lens colour due to Mike’s clue on another post.

[Mike Hodgson]

Photographic safe lights used whenever working with un-fixed paper in a darkroom. Now I enlarged picture to see lens colour due to Mike’s clue on another post.

I thought that last clue would clinch it for you .They are indeed darkroom safelights from the 1800s ,the large one on the right is a "Cardinal Ruby lamp" and is the earliest of the three .The left one is a Lancasters "Rubralux". The smaller of the three is a "Paloma" portable ideal for travelling photographers and has a red and yellow lens as has the Rubralux .
The Cardinal has a single red lens.