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post #1 of 6 Old 05-30-2008, 07:48 PM Thread Starter
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t 8 lighting

Is 2 t8 8000k 34 watt bulbs twice as good as 1, or is it just 2 bulbs that produce the same amount of light
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post #2 of 6 Old 06-02-2008, 02:50 PM
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Re: t 8 lighting

Originally Posted by sinadyan
Is 2 t8 8000k 34 watt bulbs twice as good as 1, or is it just 2 bulbs that produce the same amount of light
Technically yes, technically no. In calculating you do simply double them. In all actuality there is some loss of wattage but it is never calculated into the plant needs. The range of needs for plants really doesn't require the numbers to be overly accurate. I am sure there is someone out there that has the time to calculate restrike and lost useable light but I wouldn't even know where to start.

So yes, you would have 68 watts of lighting for the basis of calculating light levels.

On a side note, I would get a 6500K bulb and use it in tandem with the 8000K.
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post #3 of 6 Old 06-02-2008, 05:49 PM
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I'd do a 6,500-6,700k and a 10,000k one IMHO. But fish_4_all's suggestion is also a good one.
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post #4 of 6 Old 06-03-2008, 08:57 AM
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Any variety is a good thing. I think it makes a huge differenc ein plant growth and even with my cheap shop fixture, when I switched to 2 different bulbs covering different spectrums my plants grew so much better and had better color.
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post #5 of 6 Old 06-03-2008, 11:09 AM
Just to add a note. T8 lighting will soon become obsolete. T12 lighting is already becoming so. The future of T5 lighting is the way as is compact Fluorescents. With T5's and CF's you get a much more efficient lighting package.
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post #6 of 6 Old 07-06-2008, 12:07 PM
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I must agree with herfishy on that in the end, it might save you some money to upgrade to T5 or compact florescents now instead of later. Besides, CF or T5 will really brighten up any tank and make your plants look 100% better, I can almost guarantee it!
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