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Old 11-22-2011, 10:59 AM   #21
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ATI is the best as far as I am concerned. I have them on all my tanks. lol

If you have a 4 bulb fixture I would go with 2 specials and 2 blue pluses.

I currently am trying out 2 purple bulbs in my array of 12 bulbs and I can't say I like it very much. Too much purple in my opinion.
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Old 11-22-2011, 11:01 AM   #22
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How many bulbs? I hear the ATI can't be beat; maybe 50/50 Aquablue Special 12000k & Blue Plus
Well maybe by geissman... There ae a lot of great bulbs out there ati is certainly a top if not the top competitor.
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Old 11-22-2011, 11:08 AM   #23
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. Mh is the cost effective top dog as of right now
i disagree. i'd rather use T5HO than halides. an 8 x 54 watt fixture can cover a 48" tank, and can keep whatever you want. you can't do that with a single 400 watt halide, and 2 x 250 would be more wattage and not necessarily more punch.
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Old 11-22-2011, 11:13 AM   #24
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The fixture I have is a 4 bulb. I'm not looking to keep anything too insane because I know that I'd need more light for it: looking mostly at zoanthids, softies, mushrooms - things of that nature. I'd love to have a clam, but I don't think the light is going to be strong enough even at the very top of my tank for them (in the current configuration anyway).

So with the 4 bulb (plus LED moonlights, exciting I know lol!) 2 specials and 2 blue plusses eh? Do you by any chance have links to those?

Also I'm reading about "reflectors" - can someone explain? I mean, I assume its more complicated then just sticking a few mirrors in the fixtures?
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Old 11-22-2011, 11:23 AM   #25
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Parabolic reflectors are very nice, but have a nice pricetag as well.

Geissman lights have the top half of the bulb with a reflector on the inside to prevent loss of light...

Depending on the wattage id wager you could have a clam in the top half at least. If their 24" bulbs mybe not but...

I dont think ive seen a rundown of the tank, such as size and equipment.
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Old 11-22-2011, 11:25 AM   #26
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But yes reflectors ae basically that mirrors, if youre not using them now wait until you add them the differece is astounding.
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Old 11-22-2011, 11:31 AM   #27
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Parabolic reflectors are very nice, but have a nice pricetag as well.

Geissman lights have the top half of the bulb with a reflector on the inside to prevent loss of light...

Depending on the wattage id wager you could have a clam in the top half at least. If their 24" bulbs mybe not but...

I dont think ive seen a rundown of the tank, such as size and equipment.
Most of the tank has been up and running for awhile so I don't remember brands and things of that nature, but I'll post up the rundown when I get home this evening. Most of it is fairly "entry level reef tank" stuff...coralife skimmer, marineland pumps, just adding a couple of additional 600gph powerheads this evening (When they arrive hopefully). It's definitely been sufficient for my fowlr needs, but I'm sure I'll need to do some upgrading now that I'm getting into the coral game a bit.

So basically reflectors get all the light thats going up into the fixture and therefor being wasted, and pushing it down into the tank instead - how much impact is that likely to have on temperature in the tank, and is it likely to cause damage to the fixture? My tank is already sitting at around 78-80 degrees with just the lighting and pumps I have...my heater hasn't turned on since I upgraded to the T5...

Thanks and sorry for all the questions - I got knowledgable people in this thread so I'm gonna abuse em
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Old 11-22-2011, 11:41 AM   #28
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Im not sure about a heat increase with reflectors, maybe slightly. A reflector will bounce light back down from inside the fixture. So, yes it will reflect some heat, but the fixture would have reflected some heat down as well. I'm sure someone can come up with a better physics related answer based on radiant heat, but I would say you are better to have them regardless.
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Old 11-22-2011, 11:41 AM   #29
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I didnt notice a diffrence in heat when i added reflectors to my qt. They bulbs are creating the same amount of heat and the heat gets trapped in he canopy eithr way... At least thats my guess as to why it workef that way.
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Old 11-22-2011, 01:43 PM   #30
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it's not the easiest thing in the world to add individual reflectors to a fixture. what's in the fixture now? it's definitely going to have a reflector. it's either a single sheet of polished metal, or one that's contoured around the lamps. the latter is the better one.


you asked before about the ideal temp. i'm not sure if anyone answered, but i would like to keep a tank at around 78. if the lights are raising the water temp to 80, i would rather no temp fluctuation and have it 80 around the clock. corals stress most from drastic parameter changes. large temp, ph, alkalinity swings, and salinity changes can greatly effect them.
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