Metal Halide ??? Grow Light same thing ??

[soulfish]

Can someone please tell me if these lights are both the same kind. The Grow Lights are Metal Halide, I was on a Gardon site and from reading they seemed like the same thing ?? Go to Dansgardonshop.com and check it out.
How many watts should I need on a 75 gallon, if I were going to have both soft and hard ? There were 1000 watt light for $300 rather than $500 !!
Like I mentioned before I was going to purchase the CSPCM but some of you guys are making me itch over it.
I asked this one before with no respond , But does any one have a killer site to buy gear from at the lowest prices !!

[Matt Rogers]

If you can get a good bulb to fire up with one of their ballasts I don't see why not. Make sure it's a halide and not a HPS - high pressure sodium.

(I couldn't get the site to load though to check it out)

Anyway, read these threads and be sure to click on the links within them for some good info on the whole thing:

http://www.3reef.com/cgi-bin/yabb/Ya...num=1067912804

http://www.3reef.com/cgi-bin/yabb/Ya...num=1068024070

http://www.3reef.com/cgi-bin/yabb/Ya...num=1067608334

[soulfish]

Matt
go to google and type in Dans Garden Shop, it should come up as a listing, im on it right now

[Matt Rogers]

/me Looking on web for site....

Found it!

Ok,

http://www.dansgardenshop.com/garden...sysixwitm.html

Hmm.. if you are comfortable with that reflector I think your next step would be to figure out if a BT37 lamp size is kosher for aquarium bulbs. And then figure out what bulbs can deal with that ballast.

I'd be willing to bet that the bulbs that come with it are not the preferred kelvin temp, in other words, they will look really yellow.

[Jason McKenzie]

I have read recently that, do to the nature of light traveling through water, the Blue spectrum has a problem penetrating depths even in the short depth of a aquarium. This is why in todays Reef Aquarium the Kelvin temp has been going up and up. It is now common to see most people involved with SPS corals using 10000K bulbs. Now the Sun at noon is about 6500K and that would be what one would think Corals of the world would need. More and more studies have indicated that anything greater than 5500K can be used to raise Corals. Anything less is not helpful and may be harmful
J

[Craig Manoukian]

Great post J! You have hit the nail on the head!

[Cygnus]

I mean that the blue part of the spectrum is the part that travel furthest in the water. Longer wavelength such as red is absorbed by the water, which is why it mostly appears blue.

I suppose we use bluer light because it reaches deeper in the water not because it has a problem with it.

You can read a more detailed explanation here http://www.serc.si.edu/water_quality...html/water.htm

[Jason McKenzie]

[quote author=Cygnus link=board=General;num=1070474585;start=0#6 date=12/04/03 at 18:17:03]I mean that the blue part of the spectrum is the part that travel furthest in the water. Longer wavelength such as red is absorbed by the water, which is why it mostly appears blue.

I suppose we use bluer light because it reaches deeper in the water not because it has a problem with it.

You can read a more detailed explanation here http://www.serc.si.edu/water_quality...html/water.htm[/quote]

My post several post up is incorrect. I actually had it backwards, Sorry
Cygnus is 100% correct in his information. Thanks


although light below 5500K has no benefit to coral and will benefit unwanted algae.

J

is a 400 watt metal haidle too much for a 26 gallon bow front?
what would do best?

Troy,
Depends on what you are wanting to keep in there.
Do you have alot of LR and LS?
If so that would take you down to a proximately 20 gallons at 20 watts per gallon which is great for some corals.