Maybe 14 cw 6 ww , 14 rb 6 b, 4 UV as moon light ...... I would prefer to use dimmer so I can tune the light to my liking..
As for placement you have ask james or do more research .. T5 is it better to put around the middle of the tank.... I can't change mine already so I put at side don't really like it .
I like my tank color with blue led and white t5..