DonJones said:The Kelvin temperature is measure of spectrum that is more meaningful than wave length which is the other measure.
DonJones said:bbfan,
Happy New Year!
Obviously your expertize exceeds mine. Just as obviously you want to argue and I don't play that game.
Good smoking.
BBFan said:DonJones-
I'm sorry, but you are incorrect in your premise. Kelvin is not a measure of spectrum. Can you explain to me the difference between 2100k and 2700k and their respective effects on photosynthetic reactions without referencing spectral output?
Kelvin is a measure of temperature that is used to measure many things, not only light. Light spectrum is measured specifically in nanometers and as such is much more effective in determing efficacy of a light source in relation to plant growth. While kelvin may put you in the right neighborhood- it can be achieved by combining varying amounts of light in opposite spectrums; nanometers will determine the ultimate effectiveness of growth.
A conversion bulb and an enhanced spectrum bulb are two completely different things when referring to indoor growing with HID's.
A conversion bulb is a bulb that can operate using a different ballast, usually at a cost of output. I use MH ballasts and a HPS conversion bulb that will operate in my MH ballast.
An enhanced spectrum bulb is a bulb that puts out an enhanced spectrum, as the name implies. Whereas a standard MH bulb may operate in the 390nm to 500nm range, an enhanced bulb will put out some wavelengths in the 640nm to 660nm range, albiet in lesser amounts. I do not use Agrosun bulbs, but I do use SunMaster bulbs, and that is the spectral output of my enhanced MH bulb- I'm looking at the package as I write this.
My recently harvested comparison grow using enhanced spectrum MH versus standard MH and standard HPS resulted in some noticeable differences in growth, but I need to replicate conditions on my next grow to see if I achieve similar results before I can draw any sort of reasonable conclusions, though most likely it will take a few more grows. So as far as being hokum, the jury is still out until I can measure results from my next grow. Maybe you know something I don't. Perhaps the measurable difference will ultimately be insignificant for our applications- our goal here is, after all, achieving optimum results relative to investment.
Your comments regarding the use of flouros in the context of the OP's original question is really not relevant and should be discussed in another thread.
Also, your statements involving contract manufacturing are irrelevant. Proprietary technologies exist and are commonplace in contract manufacturing. Certain aspects of my business are involved in OEM contract manufacturing whereby products are produced in identical environments with different specifications resulting in measurably different end products.
Thank you for your comments and perspective- I did catch your opinion, I'm just not yet convinced that I agree with you. I do however stand by my initial statement to the original poster regarding the differences between 2100k and 3000k lighting and photosynthetic activity and response.
Happy Growing!
-BBFan
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