Make sure you are seen and safe whilst cycling in dark conditions.
The Oxford Bright Torch Light Set is easily fixed to your bike with no tools needed. Both front and rear lights have two modes to choose from - solid or flashing lights. 
Front light: 
40 Lumens. 40 hours run time on the solid light, or 70 hours on flashing mode. Runs on 3 x AAA batteries (included). Provides 270 degrees of visibility.
Rear / Tail light: 
5 Lumens. Chip on Board (COB) Technology. 60 hours run time on the solid light, or 100 hours on flashing mode. Runs on 2 x 2032 batteries.

Oxford Bright Torch Front and Rear Bike Cycling Lights - Commuter / Road