LIGHT&MOTION Vis 360, £139.99,

As you’ll see from the picture, the Vis 360 is a very compact helmet-mounted front/rear light combo. It weighs only 135g so you don’t feel it once attached — you do this by snapping both parts into the strap-on mounts (this varies depending on your helmet’s vents). Output is amazing from such teeny units, with 110 lumens out front and 4 lumens of red out back; there’s amber side lights at both ends too. Handily the micro USB port accepts most 2010 phone chargers (and USB cables);  five hours’ charging gives a couple of hours’ run time in high mode or a week’s worth in flasher mode. JK

PROS perfect for dark corners
CONS you pay for that light weight and output