has anyone ever used these lights?

[reefGods]

 

[Spare time]

Yes. What would you like to know?

 

[reefGods]

Yes. What would you like to know?

are they good to grow SPS?

 

[Mr. Mojo Rising]

Well that depends on the size and depth of your tank, but those are good lights and it will grow anything you want on an appropriate sized tank, including sps. I have the 100 watt version and I'm happy with it.

 

[reefGods]

Well that depends on the size and depth of your tank, but those are good lights and it will grow anything you want on an appropriate sized tank, including sps. I have the 100 watt version and I'm happy with it.

how many of those do I need for 55 gallon?

 

[Spare time]

are they good to grow SPS?

They can. I'd personally hang them instead of using the arm. For the price, I prefer noopsyche