If you’ve never been mountain biking at night, you’re missing out. It presents an awesome challenge; obstacles come at you faster, it feels like you’re riding at warp speed and there’s something ...

A standout for all-around safety, the Tracer 2 uses broad, wrap-around LED strips (16 modes) and a highly reflective waistband to make you visible from every angle. It secures well, provides clear ...

Slow light is an electromagnetic wave with a group velocity reduced by optical resonances in the medium through which it is travelling. These resonances can occur in atomic vapours, in photonic ...

Moses wist not that the skin of his face shone while he talked with him. Not unto us, O LORD, not unto us, but unto thy name give glory. - Lord, when saw we thee a hungred, and fed thee? or thirsty, ...

A set of the best bike lights will help you be seen when cycling at night, when visibility is poor and in bad weather – and, of course, on unlit roads, they'll light your way reliably. We have tested ...

Nothing signifies the approach of Christmas like the glow of seasonal street lights. Here's our guide to when London's festive illuminations are switched on (and the accompanying parties) in some of ...