Now it's getting more clear defined, since it's about to be seen.
Then your budget is enough for one of these three solutions:
amazon.co.uk/FisherMo-Headlight-Rechargeable-Waterproof-Flashlight-White/dp/B01N7JW9FI

ebay.co.uk/itm/Moon-Gemini-Front-Bike-Cycle-LED-Light-USB-80-Lumens/112119940143
ebay.co.uk/itm/Moon-Gemini-Rear-Bike-Cycle-LED-Light-USB-30-Lumens/122293850424

ebay.co.uk/itm/Cateye-Reflex-Front-Cycle-Light-5-LED-5-Modes-AAA-Batteries-Built-in-Reflector/132219470332
ebay.co.uk/itm/6-Modes-USB-Rechargeable-COB-LED-Bicycle-Bike-Cycling-Front-Rear-Tail-Light-Lamp/142524406821

banggood.com/XANES-SFL04-750LM-T6-LED-German-Standard-Smart-Induction-Bicycle-Light-IPX4-USB-Rechargeable-Large-F-p-1217023.html
banggood.com/46-Modes-USB-Rechargeable-Bike-Bicycle-Cycling-Tail-Rear-Safety-Warning-Light-High-Low-Beam-Flash-p-1173432.html