There are plenty of things we use or engage in as children that have entirely practical applications once you’ve ‘grown up.” Exhibit A: Night lights, those little lights you plug into the wall, soaking a room or hallway with dim, soothing light. Night lights are usually associated with little kids who are scared of the dark, which means most of us repudiate them once we see ourselves as adults (or at least adult-ish). The association between night lights and fussy babies is just too strong.

But night lights are a great idea. There are plenty of reasons you should have a few night lights set up in your house, and almost zero reasons not to.

Easily the number one reason you want night lights in your life is safety. Living in pitch blackness at night is all fun and games until you trip over a cat sleeping on your stairs and fall to your doom, or stub your toe on a dumbbell left on the floor causing a pain so intense you briefly see God. Night lights offer soft illumination that doesn’t ruin the quiet ambiance of a sleepy house or give you night blindness by straining your eyes. People tend to think of vision issues as something only the elderly need to worry about, but science tells us that every single human, no matter their age, needs light to see, and needs to see if they’re going to avoid tripping over stuff in the dark.

There’s a reason flight attendants always tell you that the aisle in your aircraft will be illuminated if both engines catch fire and you’re about to be rudely introduced to the ocean: Light helps a lot when there’s trouble. You might love sleeping in a house that’s so dark you start to disassociate from reality, but if there’s an emergency you’re going to want some light to navigate by.

Lock, unlock your door from anywhere Open remotely via Bluetooth or Wi-Fi with the eufy Security app, or by using either the electronic touchscreen keypad or the key. A built-in sensor detects when your door is closed and locks it automatically behind you, keeping your home secure even when you’re in a hurry or your hands are full. Certified by the American National Standards Institute to work after locking and unlocking 250,000 times, Smart Lock can easily handle the daily comings and goings of a busy household.

Okay, there’s a lot of evidence that sleeping with lights on in your bedroom can have an adverse effect on your sleep. But it’s important to note that this applies mainly to bright and white light, which can fool your body into remaining in a state of relative alertness even when you’re unconscious, resulting in poor sleep quality. As we’ll see, the right night light in your bedroom can actually help you sleep better. If your bedroom is dark as a subterranean cave and you’re still struggling to get a good night’s rest, consider adding a night light.

So if you’re tired of living in a void, how do you choose a night light? A few things to consider:

Far from being childish, night lights actually improve our lives—they make us safer, can help us sleep, and ensure that the monster under the bed stays there.