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Old 10-16-2011, 04:13 PM   #11
gre
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I was kinda hoping not to get a new hood for my tank. Would there be a huge difference between a T5/T5 High Output and the T8 bulbs I have listed above?
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Old 10-16-2011, 04:27 PM   #12
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yes there is a huge difference between t5ho and t8 bulbs. Here's some charts that were made with a PAR meter that show the difference in output between different fixture types
PAR vs Distance, T5, T12, PC - New Chart

Just know that as you increase light intensity you will also increase the demand for ferts and co2.
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Old 10-17-2011, 09:18 PM   #13
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Just Purchased a fixture that has two 24" T5HO bulbs. I am assuming this will be more than sufficient for my 15gal tank?
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Old 10-17-2011, 10:18 PM   #14
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It will be assuming you have co2 and dry ferts. Otherwise it's probably too much light.
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Old 10-17-2011, 10:47 PM   #15
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Yes, now I have a decent CO2 system in place, literate mixed in my gravel and also some liquid plant fert/nutrients. I will also be limiting the exposure to a few hours a day and possibly working my way up provided plants are doing ok. (I got the fixture for a really good deal I couldn't pass up.)
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Old 10-18-2011, 12:37 AM   #16
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2x24w may be difficult to manage over that size tank, but it sounds like you are prepared for that.
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Old 10-18-2011, 12:39 AM   #17
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If it becomes a problem I may just re-wire it (if the bulbs are hooked up in series) to only run one bulb (Electrical Engineering Student ).
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