These lights are great. I thought they would be hard to install but they included double sided tape so they just stick right on. My favorite feature is the timer. I’ve used similar products before and on the first use, I forgot to turn them off and immediately wasted the batteries. With these, however, every time I turn them on, I set the timer right away and they never accidentally get left on. They do take 4 AA batteries each but the timer feature will definitely help them last for a long time. I would definitely recommend these lights.