Lighting

Depends what you're keeping. For a 55 gallon tank, I'd recommend a four bulb t5ho fixture which would be 156 watts using 36" bulbs or two "black box" led fixtures, which you'll probably never run above 50% power so..... 120 watts for sps corals (eventually) or more likely, 75 watts total for soft corals.
 
How many watts for a regular 55 gallon tank
Two 135 or 165 wt fixtures

OR

2-3 Orphek OR3-120 lights

OR

2 Ai Hydra 26 or 32hd
 

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