every one say that in budding stage you need more of the red light then any thing.... as i am using cfls 42 watts x 4 and 2x 14 watt ..i bought a red light bulb and thought it would help... am i wrong?
I think the red spectrum of light is part of the light spectrum humans cant see, so just adding a red filter to a bulb wouldnt make it a red spectrum, I may be wrong thats just what I think I may be wrong and would like to hear someone more educated to find out. But then again you can see the red in sodium and the blue in metal halide so not sure. Sorry just pickled your head more probably, I just did mine haha
But you know you can buy cfl bulbs with either red or blue or even duel spec.
red spectrum bulb aren't red...they are white bulbs that burns with a rose,,,kind of pink color...anyway...cfl bulbs for flowering is the 2700k bulbs...you go by the temperature(K)...for veg..you can go with 5000k on up...i have some 6500k for veg...
A red filter over the light will adjust the wavelength of the light. However, it also defuses the light and makes it less intense. There are "red" bulbs if you are looking at LED's or plasma burners. Otherwise, for normal bulbs (like the CFL's you are using) the wavelength or color of the light you are using is measured in Kelvin like Miwa said. Anything below 3300K will have a reddish orange look to the color of the light and be skewed to the red side of the light spectrum. The higher the number the more blue in the light.
what I heard is violet and blue 420nm-470nm spectrum is more used in budding and veg stage, instead of more red. for flowering stage, I think you can use both led with more red spectra and CFL, which will be better than only led I think.
Violet and blue reduce interode length and increase chlo A and B production. While the light is still needed in the flowering phase for growth, it's main production is for veg.