CATEYE Velo Gift Set, £34.99,

Though the front light is compact, its two AA-powered LEDs punch out plenty of light in flash or steady modes. The bracket is tool-free and the light can be slipped on and off in seconds. The rear has triple LEDs, powered by a pair of AA batteries and the bracket attaches to your seatpost with minimum effort; there’s also a rucksack mount for it too. Both lights provide roughly 100 hours in flash mode. The gift set also includes a cable-mounted computer with basic functions such as speed, max speed, distance and trip info. We’ve seen the set for as little as £30 online, including batteries,
a real bargain. MC 

PROS price, output, computer 
CONS battery cost