6500K & 4500k

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FATBOYFRESH

Well-Known Member
Hello to all my growers out here... This thread is designed to be a vehicle to exchange facts concerning CFL grows....

Time and time again im sure that you have witnessed the thrashing CFLs have endured when compared to HPS MH or LED...

Do we have to bite the bullet and admit that CFLs cannot/donot produce DENSE buds and leaves more to want in the PENETRATION department!

I dont think so.... I believe its all about our understanding......

I and many people have come to understand that 6500k is best for veg and 2700k us best for BLOOM...

Recently i have read a post where weins law was mentioned which lead me to believe that 6500k IS good as far as veg but 2700k is INCORRECT as far as flowering is concerned.

Weins law dictates that

Wavelength (nanometers) = 3,000,000 / Col temp (Kelvin).

So the PEAK of a wavelength has a RELATION to its temperture (K)

Given that AND that we know that
Chlorophyll A: absorption peaks at ~440 nanometers (blue) and ~660 (red)
440 nanometers = 3,000,000 / 6,818K
660 nanometers = 3,000,000 / 4,545K

Chlorophyll B: absortion peaks at ~470 nanometers (blue) and ~640 (red)
470 nanometers = 3,000,000 / 6,382K
640 nanometers = 3,000,000 / 4,687K


6500k & 4500k would be correct color temps (k) to use TOGETHER for veg and flower.. I am going to run this configuration with my current grow...

Has ANYONE grown with this combo .... if so....lhow where the results.... Pix if u have them plz
 
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churchhaze

Well-Known Member
Wein's law is for black body radiation sources which fluorescent lamps are not. It has nothing to do with your cfls and their spectral distribution.
 
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FATBOYFRESH

Well-Known Member
churchhaze said:
Wein's law is for black body radiation sources which fluorescent lamps are not. It has nothing to do with your cfls and their spectral distribution.
Click to expand...
Tho That maybe true..but their is a relationship of tge peak of a wavelenth in nnm to the k in color temps

ALSO...the ?s you answered where rhetorical... The REAL question is have YOU GROWN with that configuration.... If so... Pix and journal please.... If not... Cram it

Thanks
 
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