Some of the best night light for sleeping is designed to keep on for most of the night. Of course, this also means it will consume more battery or power, whichever it works on. To avoid this, look for something which will get dimmer or generally consumes less energy. The best option is to check for something which you can place on your bedside table. This way, you can switch it off before falling asleep. Now some people have the habit of sleeping without remembering to do this, so the motion sensor type works brilliantly. Once movement stops for a set amount of time, it will switch off by itself. So, look for options and use something that suits your purpose well and conserves energy too.