Originally Posted by bserrano2
The minute i plugged it in my betta went crazy even hit the tank.
You know how it hurts your eyes when someone turns all of the lights on after total or near total darkness? That's what happened to your betta, unlike us, they can't really close their eyes or squint till their eyes adjust, so they panic. The best thing to do here would be turning on a less direct, but nearby light, and letting his eyes adjust before turning on the tank light.
PS "Blackwater" would help immensely here, bettas are a low-light fish.