We got the lidl camping light/work light. Was very impressed with it, very bright and has a car charger to replenish the batteries. Haven't used it camping yet but did use it in the kitchen when the kitchen bulb went! Been looking out for another one and typically they haven't had them anymore.
Amazing family weekend with old steam engines, classic car displays, market stalls, and full catering and bar. And camping on site - Save £25 by booking in advance.