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Which light should I buy? 2 24" or 1 48"? 75 gallon 48" tank.


EvilVegan

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I'm setting up my 75 gallon tank, I just ordered this: http://www.ebay.com/itm/50-Live-Aquarium-Plants-12-Kinds-Anubias-Amazon-Sword-Vallisneria-n-more-/121549760334

 

So I'll have 50ish plants soon and I want to start fishless-cycling this weekend.  

 

Which light should I get?

 

Should I get one light for each "side" or just one big light that covers the whole tank?  Or should I get 2 lights each going from the edge to the center support?  I could have them running on different timers, so the right side of the tank is on during the day and left during the night.  No need for a refugium!  Insane, sleep-deprived fish!

 

I was looking at this 48" monster: http://www.amazon.com/Finnex-Aquarium-Actinic-Light-24-Inch/dp/B008460C6E/ref=sr_1_4?s=pet-supplies&ie=UTF8&qid=1422388036&sr=1-4&keywords=plant+light

 

But I don't know the PAR value and I think it's a bit too "cool-blue" for goldfish coloration.

 

Money isn't a huge problem thanks to tax return and my ability to ignore soul-crushing debt while buying aquarium supplies.

Edited by EvilVegan
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http://www.amazon.com/Deep-Blue-Professional-ADB42548-Solarmaxhe2/dp/B005DGHMRA/ref=sr_1_5?s=pet-supplies&ie=UTF8&qid=1422394146&sr=1-5&keywords=solarmax+HE

 

LOVING this light! It has a 6,700k and 10,000k bulb perfect for plant growth as well as gorgeous moonlight LEDs.

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I prefer one long light vs 2 shorter ones.  :idont

 

I do too.  When I had a 55 gallon and had two 24" lights, it seemed like the dead center of the tank wasn't lit as well.  There was that small gap between the lights and it was noticeable.

 

Give me one long light every time.

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I bought this light for my 55g and I'm LOVING IT!! Came with one 12000K white and one actinic light. Both 54W T5-HO lights, plus the fixture has legs. My plants boomed and all the fish got extremely colorful. Nice price as well. I would highly recommend this light.

 

http://www.ebay.com/itm/T5-Dual-48-Aquarium-Light-Marine-Coral-Reef-Cichlid-108W-/261743743599?

Edited by Kiara
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You know what's funny, you'll get better spread from two fixtures if you set them up properly. If you plan on hanging them go with two shorter, if not get a long one.

 

I don't know what kind of penetrating power a Finnex LED has over 22 inches since we can't get them here, but if you want flexibility you can always look at a multi-bulb T5/T5HO unit and only use half the bulbs or muffle with duckweed, pistia, azolla, etc. Usually they come with multiple switches so configurability is simple. As for bulb temperature that is really up to personal preference. LED units tend to be between 7000-10,000K or a blend of differing Kelvin.

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