t5 spectrum optimum for LPS reef

[BucNtears]

As of right now I've got 48" Tek Light: 6-54W T5 High-Output Fixture from reefgeeks.I'm wanting to get more lps inside my glass box.I've got a couple of lps in right now brains,lobo,frog,hammer,torch,bubble.a couple of soft corals and rics,zoos.
I'm looking at upgrading to maybe a 120{depth} or 125 {width}so would I have to upgrade my lights or would I be ok with what I've got right now?
Aso where should placement be for the lps..To get the most color some of the pics from other tanks is what I'm after...
sorry for the long post
Thanks

 

[BucNtears]

Also what flow do they like?

Thanks

 

[Scythanith]

I have a Quietones 6000 return pump with a 6' head height so Im getting ~ 950 GPH & a Koralia 3 with ~850 GPH so that's a total of ~ 1700 GPH. My tanks display volume is 85 gallons. So my tank turns over ~ 20 times an hour. My chalice corals seem the fussiest over flow. Each one requires something a little different. Other than the chalice, I am the most careful with corals like Lobophyllia, Trachyphyllia, Blastomussa and Scolymia's. The acans, zoa's, goni's, alveopora's, etc aren't too picky.