Go Back   Aquarium Advice - Aquarium Forum Community > General Aquarium Forums > General Hardware/Equipment Discussion
Click Here to Login

Join Aquarium Advice Today
Thread Tools Search this Thread Display Modes
Please support our sponsors and let them know you heard about them on AquariumAdvice.com
Old 07-18-2011, 02:48 PM   #1
Aquarium Advice Newbie
Join Date: May 2011
Posts: 10
T5HO for 7', 200G Long Aquarium

Hello All,

Running two 4'x2' T12 fixtures over my 7' 200G long and the fixture hanging over the edge is driving me nuts. T5HO seems to be a good bet, but I could use advice on the following:

1. Light Fixture Quantity/Size. Should I run two 4', 2-tube fixtures for a total of 216W? These are skinny enough to stagger on top of the aquarium so they overlap in the middle. One 4' and one 3' fixture would fit, but would result in a 14% decrease in lighting wattage (down to 180W).

2. Lamp color? The fixtures I'm looking at (48" T5 HO Aquarium Light Hood Cichlid Marine 108W New | eBay) come with one 10000K bulb and one actinic. Will this be ~14000K? Will it be the wrong color? Looking for bright white, 6700K T12 bulbs appear too blue in my current setup.

3. Ability to grow plants. Even with the two 4' fixtures, I'm only ~1W/gallon. Is this enough to grow some plants? Can I supplement with CO2 for the lighting level? Is this considered "low light"? Will it look dark when viewing?


jkpq45 is offline   Reply With Quote
Old 07-18-2011, 11:16 PM   #2
Aquarium Advice Addict
huma-huma's Avatar

POTM Champion
Join Date: May 2011
Location: washington Pa
Posts: 5,257
6500k will have a yellowish tint to it...10K'S have less yellow and more pure white. 12k moves toward the blueish white tint. 14k is pretty much bluish purplish.. being as its a 200g 8footer... you are gonna want to run 4-6 bulbs per side.(8-12 total) to house some higher level plants.. the watt/gallon rule is too outdated and not effective for comparing newer g4 and t5ho...and esp leds. Unfortunately running 2 bulbs per side isn't gonna get you the penetration you need to grow plants

my 125g Sw...Round 2!http://www.aquariumadvice.com/forums...220171-33.html
ever see someone cut a 125g in half??
huma-huma is offline   Reply With Quote
Old 07-18-2011, 11:50 PM   #3
come get me tang police!
jetajockey's Avatar

Join Date: Apr 2011
Location: In a swamp near you /Pensacola, FL
Posts: 12,047
here's a chart that will help you figure out what kind of lighting you'll need.
PAR vs Distance, T5, T12, PC - Updated Charts

Running 2 bulbs per side isn't going to be a penetration issue as much as not having an even spread across the width of the tank. That can be remedied by placing the fixture higher up if you have enough extra light intensity to compensate with.

A good even coverage and decent PAR are most important. And even if you don't manage to get even coverage and have dark spots, you'll just have issues with the parts that are shaded.

6700k is the 'daylight' area for bulbs, although different manufacturers have different ideas of what that means, so sometimes one will look different than others. I like the ~6000k lights, they have a slight warmth to them, while 10000ks have an operating room feel to them. A lot of people will mix the two to get a nice balance of light.

I wouldn't cheap out on the fixture for a large tank like that, spend the extra and get a quality fixture with good reflectors and bulbs. It would look a little weird if you don't have a canopy covering it, but you could use 1 4ft and 1 3ft fixture to get a better fit over the top of the tank.
Dont Forget to Join my FREE weekly Plant Giveaway.
Click Here!
jetajockey is offline   Reply With Quote

long, t5ho

Please support our sponsors and let them know you heard about them on AquariumAdvice.com

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Article: What You Should Know About Fish Nutrition Fishguy2727 Freshwater & Brackish - General Discussion 14 02-01-2012 08:41 AM
Clear plastic pipeline aquarium Yavindish DIY Projects 6 07-28-2011 10:00 AM
How long can aquarium safely go without power? sdrone Freshwater & Brackish - General Discussion 24 07-14-2011 10:38 AM
24" Current USA 2x24w t5ho over 20g long is too much light? darkxrose Freshwater & Brackish - General Discussion 7 07-08-2011 10:27 PM

» Photo Contest Winners

Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -4. The time now is 06:45 AM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2018, vBulletin Solutions, Inc.