The 3 pack of lights are really nice to have where you need extra light at night or in the dark to see alot better for the use you want them for. I was surprised how bright these lights are and I chose to put 2 in my hallway so at night the motion detection in the lights will turn the lights on and what a difference it makes!! I put the other one on the inside of my computer hutch so I can see the keys on my keyboard better. The installation is easy and you can either install with the screws provided  or with the 3m tape also provided. There are endless places these lights will come in handy like a closet or on stairs to light your way. These take 3 aaa batteries to work and all you have to do is slide the light off the base when needs changing very quickly to do.