Do all plants need special lighting? - Page 3 - Tropical Fish Keeping - Aquarium fish care and resources
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post #21 of 35 Old 02-19-2010, 11:50 AM Thread Starter
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yea it is about that thick... and yes im sorry the "battery" is the ballast. is there a way to tell if its a daylight bulb by looking at it and its parts or would i have to look it up online by the maker of the bulb?

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post #22 of 35 Old 02-19-2010, 12:34 PM
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T12 is your size there. So when you go shopping make sure you get a size T12. It'll say it on the shelf and boxes what size they are, eg for a GE on the pack it'll say F15T8 for a T8 sized bulb.
T8's are about 1" dia and T12 about 1.5" dia.

I honestly wouldn't worry what you got there because of the age, I'd buy a new one for plabts.

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post #23 of 35 Old 02-19-2010, 01:27 PM
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T12 is your size there. So when you go shopping make sure you get a size T12. It'll say it on the shelf and boxes what size they are, eg for a GE on the pack it'll say F15T8 for a T8 sized bulb.
T8's are about 1" dia and T12 about 1.5" dia.

I honestly wouldn't worry what you got there because of the age, I'd buy a new one for plabts.
I wouldn't get a T12, T8 are better. Both fit your fixture. T12 are the older type and don't last as long and are slightly less intense. The T8 are superior tubes, and as I say fit all regular fixtures. You may not be able to find T12's insome places, they are being phased out by T8's and now the newer T5 NO.

Just get a Daylight, Enhanced Daylight, Ultra Daylight, whatever they call it, full spectrum is another designation, and if the kelvin number is given as most are now, look for something around 6500K.

Byron Hosking, BMus, MA
Vancouver, BC, Canada

The aquarist is one who must learn the ways of the biologist, the chemist, and the veterinarian. [unknown source]

Something we all need to remember: The fish you've acquired was quite happy not being owned by you, minding its own business. If you’re going to take it under your wing then you’re responsible for it. Every aspect of its life is under your control, from water quality and temperature to swimming space. [Nathan Hill in PFK]
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post #24 of 35 Old 02-19-2010, 04:56 PM
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I wouldn't get a T12, T8 are better.
Well her hood fits a T12 right now from her description ; so that's why I'd get a proper light int he size she needs w/out the extra high cost of buying a whole new hood for her tank

I pers hadn't tried/ hear of T8 and T12 fitting in the same hoods (all my tanks run on T8s)...but if you say so....

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post #25 of 35 Old 02-19-2010, 05:01 PM
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My hood originally came with a T8, and I bought a T12 for my plants and it fit. now I'm concerned though since byron said it's less intense. :p I looked for T8 couldn't find one.

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post #26 of 35 Old 02-19-2010, 05:07 PM
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My hood originally came with a T8, and I bought a T12 for my plants and it fit. now I'm concerned though since byron said it's less intense. :p I looked for T8 couldn't find one.
Look at the lumens rating on the T8 and T12 bulbs. That's the measure of brightness. If I remember right, the difference between the two wasn't that much.
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post #27 of 35 Old 02-19-2010, 05:45 PM
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okay, I just checked a couple of bulbs. a 4' T8 32 watt bulb has a lumens rating of 2950. A 4' 40 watt T12 produces 3000 lumens. So if you were to use a 40 watt t8, I'm sure it produces more light for the same wattage as the t12. I don't have a t8 40 watt bulb to see what the lumens are to compare.
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post #28 of 35 Old 02-20-2010, 11:21 AM
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Yes, it is a minimal difference as others have rightly mentioned. The more significant issue is durability. Diana Walstad allows 1 year for T12 and 3 years for T8, and I have come across similar recommendations on plant networks to which I belong. I still use some T12 (the Phillips) because that's how they come, but I like the T8 simply because they are easier to get in and out of those tight fixtures, being smaller diameter it's easier to get my fingers around the tube. And when I go to replace them after a year or so, they can sometimes be "stuck" so this helps.

Austin, your T12 is fine. You replace it afdter 12 months. If you can find T8, go for it. The smaller length tubes are less expensive, so the replacement cost is not what it would be for me with 4-foot tubes.

Byron Hosking, BMus, MA
Vancouver, BC, Canada

The aquarist is one who must learn the ways of the biologist, the chemist, and the veterinarian. [unknown source]

Something we all need to remember: The fish you've acquired was quite happy not being owned by you, minding its own business. If you’re going to take it under your wing then you’re responsible for it. Every aspect of its life is under your control, from water quality and temperature to swimming space. [Nathan Hill in PFK]
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post #29 of 35 Old 02-20-2010, 10:19 PM Thread Starter
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so it would be better to use a T8? and if i do use a T8 do i still replace it every year or will it last longer than that?

I dream of a better tomorrow, where chickens can cross the road and not have their motives questioned.....Dont worry about what people think, because they seldom do.......If you cant laugh at yourself I'll be glad to do it for you.....stop trying to impress people, they're too busy trying to impress everyone else to notice
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post #30 of 35 Old 02-21-2010, 12:26 AM
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I think T8 lasts 3 years is what byron said.

"He situates himself in relation to time. He takes his place in it. He admits that he stands at a certain point on a curve that he acknowledges having to travel to its end. He belongs to time, and by the horror that seizes him, he recognizes his worst enemy. Tomorrow, he was longing for tomorrow, whereas everything in him ought to reject it."
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