06-02-2008, 03:50 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.