What is a one-sentence summary of the following article?
Light, particularly natural light, stimulates our brains to release serotonin, which helps us to wake up and feel alert. It is a crucial step in the process of waking up, and it will help your child to overcome the early-morning drowsiness that they are feeling. Open the blinds or curtains in your child’s room about 15 minutes before you want them to get out of bed. The sunshine will help them to wake up naturally. These automatic lights function like an alarm clock but with light instead of sound. They function by mimicking sunrise. They do this by slowly increasing the brightness and intensity of the light they emit. This helps your child to wake up and feel alert. Wake-up lights are especially useful for the winter months when sunrise may be after the time your child needs to wake up. They are also valuable if you live in a particularly cloudy or foggy environment. Digital devices such as smartphones, laptops, tablets, and TVs all emit blue light. Blue light, or short-wavelength light, alters our bodies natural rhythm. Studies have shown that people who were exposed to blue light in the two hours before they went to bed had trouble falling asleep, took longer to wake up, and were more tired and confused in the morning.  Have your child put away their electronics 2 hours or so before their bedtime. Instead, have them read, play a board game, or do a puzzle. This will help keep your child’s natural sleeping and waking schedule on track. You can also purchase special filters for electronics that will block much of the blue light that is emitted from these devices.

Summary:
Open the curtains to let the sunshine in. Buy a wake-up light. Limit blue light exposure before bed.