The lights work well and illuminate to mimic a sunrise, the night light feature is very handy for a child who won't be sleeping in total darkness and there are different colours to choose from to accompany sleep. The side tone, with 8 melodies is super small and very soft enough to gently pull out of sleep, it's bright enough to be clearly visible during the day and goes out depending on the weather you want at night, perfect for a child to fall asleep at night with a soft light and then turn off automatically, also perfect for a child prone to nightmares/scares. Using the temperature sensor, it is very easy to set up and displays perfectly even in the middle of the day. The alarm clock has a safety lock function to prevent your child from accidentally changing the setting function.