ONE23 Ultra Bright/Super Bright, £35.49,

Another great value front/rear lightset, this one offers slightly beefier output and longer burn times (a fortnight of two hour-long commutes) than many rivals. Up front there’s a wide beam 1-watt LED
lamp (available in six colour options) with steady and flashing 
modes. Out back there’s two additional and very bright (white or red) LEDs. The Ultra Bright snaps onto a regular screw-on bar mount, while the Super Bright has a simple clip for seatposts or backpacks. MB

PROS bang for buck, rear visible at 500m
CONS if you don’t use rechargeable AAAs, battery cost mounts up over a long winter