My data should not be considered normal. I have a six year-old who goes to sleep at around 10pm and wakes up at 7:30am. Sometimes later than 10pm. She's been do

My data should not be considered normal. I have a six year-old who goes to sleep at around 10pm and wakes up at 7:30am. Sometimes later than 10pm. She's been doing this for at least a year. When younger, she wasn't a napper. Extreme attitude if she goes to bed after 11pm, but bed time between 9pm-10pm yields a fairly consistent mood for the day. If left in a dark room by herself at 8pm, she'll be awake for at least an hour. Now we just let herself read herself to sleep. The four-year-old and two-year-old go to bed at 8:30pm and wake up 7am. They have stronger negative responses to going to bed later. The 6-year-old reads by herself for a couple hours a day? And is read to for about an hour. I would guess she's in front of a screen for two hours per day. Maybe more when she dives into BrainPop or something.