Jetbeam’s flat, rectangular three-in-one E26-UV Kunai pocket torch (or flashlight for those in the US) is one of the most versatile models on the market and easily one of the brightest for its size.

UV (ultra-violet) LEDs can produce eye-catching effects when their light is allowed to interfere with certain colours, particularly with reflected light under near-dark conditions. Also try shining ...

Lightwood, Derbyshire: Shine it on a simple green plant like moss or saxifrage and they become glittering, baroque jewels I’m blaming my fellow diarist Kate Blincoe. Recently, she extolled the joys of ...

Muyshondt makes totally over-engineered, no-expense-spared pocket flashlights for camping and other uses, but this one uses an ultraviolet LED made especially for watches — and, more specifically, ...

You’re unlikely to see one in the temperate rainforests of North Wales. But should you stumble upon a polar bear and shine a UV light on it, its fur will fluoresce a trippy mix of reds, oranges or ...