Review on 🔦 Bedside Reading Lights with Noble Wooden Design [360° Rotatable, Dimmable, Magnetic] - Portable Battery Powered Lamps for Bedrooms Living Room - Rechargeable Night Wall Table Lights for Reading by Jasmine Harris

I don't know why there are three levels of brightness. If you hold the switch, you can smoothly dim the lamp from full brightness to about 1/4 brightness. IMO, that's a great approach. "Bad” glue is actually a great glue product. This is a 3M VHB tape. Search the Web. I've used this glue before and it sticks strongly to a clean smooth surface. Let me repeat again CLEAN AND SMOOTH You need to prepare the surface properly with denatured alcohol or something similar. You can forget about it by sticking to textured drywall covered in water-based paint. It may last a while but will fall off soon. If you need to stick to a wall, you need to figure out how to provide a smooth base, some glass, smooth tile, painted wood, etc. A nice finished headboard will work. In this respect, the manufacturer's descriptions are somewhat misleading. Battery life has yet to be determined, but if it's a similar bulb that I bought from Taotronics here at Revain, the bulb will stay on for hours. In the darkest mode, it can last several days. You can also leave it connected to USB if you prefer. When connected it works fine.