Light on for 8-10hrs a day IMO
You got ammonia? Not good at all. Someting died, rotten leftover food, test kit bad, didn't cyle completely or something. I got a bad feeling your tank is too young and not settled yet and things might get worse.
Not to be the naysayer, not having anenome experience, but that ammonia presence is troubling. An 8g tank is hard enuf for a new sw
fishkeeper, and an anenome within 3 months, I'd suggest you see if you can return it and get something before it becomes jelly and everything is lost. Then take your time, add your fish and practice and learn how to keep that water stable.
You'll enjoy the experience a whole lot better. And cheaper.