Light up wake up clocks- how young can your baby start using it?

I have an 8 month old and for months on end he wakes up between 4:45- 5am on the dot pretty much every day. We’ve tried everything! Sometimes I can get him back to sleep but I have to start getting ready at 5 for work. And in this old creaky house with the bathroom right next to his room he hears us moving and is back up. With the daylight savings he’s now up around 3:45!!! And wants to play hard.

Is he too young to learn the lights on one of those toddler wake up clocks?

Any suggestions on how to get him back to sleep?

Thank you, we are two sleepy parents!!!