S.L.
To me bad behavior means earlier bedtime, if 8 isnt working try 7:30
I recommend you work on his bedtime routine. Cut out any sugary snacks after dinner, (no caffeine or chocolate in the afternoon) Bath or shower at 6:50 -7:00 sharp then read books together in a very quiet room. then lay down in bed next to him for ten minutes and chat quietly then be out of there at 8:00 sharp. Give him anything he might ask for stuffed animal, water bottle, night light, Then do what super nanny recommends, if he gets up do not talk to him or engage in any way just quietly walk him back to bed. Can you make it darker in his bedroom in the AM? try hanging beach towels on windows and if it helps you can buy dark shades.