i need lighting

The set-up in that link is for (4) 6' T-12 VHOs. For a 180g tank, I think you will need more light than that to "Keep anything" you want. SPS and clams will not be happy under that amount of light. You will need more. I would suggest (3) 250w Metal Halides. and possibly supplimenting with (2) 6' VHO actinics.
 
WOW I was hoping the 640 watts of VHOs would really do better than that? So I guess from what you are saying I MUST have MH's...........that sucks! A 72" 3x250 MH w/ 2x VHO atinic your talking about is like $900-$1200......OUCH!!!
 
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