Review on Button Lamp BL-6885: Lightweight, Ultra Small, Ultra Bright Adhesive LED Utility Lights - 6 Pack by Robert Worlds

These one-way LED push button lights are ideal for small areas that need good lighting. They're very bright, so be careful to position the lamp so you don't get momentarily blinded when you press the switch. The switch takes some "force" to turn it on and off, which means the plastic can fail after so many uses. I think if someone wants to use them indefinitely, you could probably carefully break the seal to swap out the batteries. Too bad the manufacturer didn't design them to be reusable after the battery dies to prevent another item from ending up in landfill.