lighting

[ChillingBoy]

was wondering if two 175 MH enough lights for 90 gal with sps??

[demonsp]

ok how many watts. and if 175 watts should be good for softies. but not much more.

[ChillingBoy]

what about SPS??

[demonsp]

i still dont know your watts.?if only 175 watts i would say not to well may live but not grow or resproduce very well.

[demonsp]

mb this might help.

http://www.marineandreef.com/Info/lightingchart_hood.html

[killingseed]

ya was going to post that, but depands on the length of the tank. and how deep, but i would try for something like for a 4ft tank 2 175 w and maybe a couple 65w pc or t5 to add some blue to the spectrum

[davocean]

That's a cool link.
He has 2 175's, so your on the light side for sps.
It would be nice to have something along with that, like a couple T-5 actinic's.
Gives good color too.
Another thing to consider is tank depth.
24" or deeper would be nice to have 250w MH

[killingseed]

not even sure if he is adding them to any light he might already have!

but i think you get more W for the t5's

[bertoni]

Two 175 W bulbs might work well, depending on the reflector, ballast, and the actual bulb. The Iwasaki 15,000 K 175 W bulbs are very efficient, for example, and I like the spectral content, although that's personal taste. In general, 250 W bulbs seem to be more common on that size tank. This site has a lot of data:

http://www.reeflightinginfo.arvixe.com/

[Nami19]

I would go with at least 2 175W for SPS, 1 won't be sufficient enough for a 90 IMO