Switching from mh to t5 u think be beneficial for sps?

I run 12hrs total, 1.5 just blue +, then blue+ and coral+, then 1.5hrs just blue+ at end of day. Only a 4 bulb fixture on a 40B.
 
Thanks for the replys the reason I'm asking is I would like to have the lights on longer then I used to with metal hilides for obvious reason viewing the tank:) how do u like the 50/50 blue plus and corsl plus?
 
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