The Casper Glow Light is one of the smallest lights I've tested, but it managed to be plenty bright to wake me up in the morning. Not only is this little light incredibly bright, it's also super simple to use with both physical controls and app setup. Within the Casper Glow app—which is unfortunately iOS only—you set up your wake-up time, and the Glow Light will start to brighten 30 minutes before that set time. You can also set how long you want your Glow Light to dim for, which it will use both in the evenings and after it finishes waking you up.
But the real fun comes from the physical controls and flexibility. The Glow Light is a battery-operated stand-alone lamp that you can pick up and move around to use, and you turn it on and off by flipping it upside down onto the other side. When you turn it on, it will immediately activate its highest brightness and will dim for the amount of time set in the app (default is 45 minutes). You can also press the button on top of the Glow Light to pause the dimming, and twist the light to either the left or right to make it brighter or dimmer. It's so easy that my two-year-old thought this thing was a light toy rather than my personal alarm clock. The immediate wind-down light is plenty of time for me to lay in bed and read, but I love rotating the light to get my perfect level of brightness as I relax in bed.
It has a little charging base it can sit on and is supposed to last around seven hours of brightness on a charge. That should be about three days of use if you have it bright for about an hour before bed and in the morning. Some nights I keep it on the charging pad, while others I just leave it on my bedside table. It's a really handy little light, and one I plan to travel with since it's so compact. The only downside of this adorable lamp is that there's no sound options.