lights all depend on the typ of corals you want. i dont know much about lighting but i know any nice led lights will be good for just about all soft coral. have you looked into a bio cube?
i always qt new fish. it stops me from adding fish too fast and it assures a healthy fish is being added to my tank. i used to lose fish befor i used my qt for new fish but now all fish that i qt not only don't die, they thrive.