2x prime 16Hd enough for 4ft tank ?

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Jeeperz

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I've had a prime hd over my reefer 350 for 6+ months as the hydra26 died. I was going to put 3 Hydra 26 over it but they changed to the 32 and I don't like those. I have a bunch of blue stylophora and an unknown wild sps that have grown, they are mostly in the center 2 feet of the tank with a green Monti at the same level that's grown a bit. Also an rbta, leather mushroom. It definitely won't light the whole tank. I'd use 3 at the minimum.
 

ApoIsland

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I have a Red Sea 350 that’s 4ft long and about 20” wide. Is 2x 16hd prime enough for softies and LPS? Is 3 over kill ?
I would put 8 of them on that tank if you want good light coverage end to end front to back.

I had one on a 16g cube and was limited to what I could keep on the sides. They are really good for a 12x12 area though.
 

mrpontiac80

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I have a 4’ tank that originally had 2 prime 16 hd lights. They did ok but once I added a 3rd I could tell a big difference. I eventually bought a par meter and was only managing a max of about 250 at the top of my rocks using mostly blues with just 14% of whites. I just upgraded last week to a reefbreeders 48 photon v2+. Couldn’t be happier with the spread and better par. I’m going to use the primes over a smaller tank with softies and inverts. They are good lights but you need several if you end up with more demanding corals
 

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I would put 8 of them on that tank if you want good light coverage end to end front to back.

I had one on a 16g cube and was limited to what I could keep on the sides. They are really good for a 12x12 area though.


Have you ever used a par meter with them? What settings? What mounting height? they can very much light an 18^3 area
 
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8? That’s overkill for what I’m keeping lol
I would put 8 of them on that tank if you want good light coverage end to end front to back.

I had one on a 16g cube and was limited to what I could keep on the sides. They are really good for a 12x12 area though.
 
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I have a 4’ tank that originally had 2 prime 16 hd lights. They did ok but once I added a 3rd I could tell a big difference. I eventually bought a par meter and was only managing a max of about 250 at the top of my rocks using mostly blues with just 14% of whites. I just upgraded last week to a reefbreeders 48 photon v2+. Couldn’t be happier with the spread and better par. I’m going to use the primes over a smaller tank with softies and inverts. They are good lights but you need several if you end up with more demanding corals
Thanks I might just go with 3
 
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