Normal price £19
I have used these for years and recommend. I really like how they make it effectively impossible to be in the dark at night, they light up as they spot you. Put them around the places other than bedrooms and you don’t ever really need to turn on a light at night. Two light settings and I put on low in small rooms (bathroom) and high on bigger spaces (landings, hallways).
The sticky parts do fail eventually so “top tip” is place them resting over something which holds the weight so the stickiness only has to hold to the surface e.g. over the frame of doorway.