black light?

Has anyone used a black light or a fish aquarium cfl with hid for more blue spectrum during veg? Im gonna used 2 black lights cfl s 2 daylight cfl s and a 400 watt hps the entire grow on my next grow! Thinking that might be a good combo for spectrum.i grew this batch with 4 cfls and 3 200 pure light indecent.

Interesting! Give it shot and tell us what happens

I use my pc's from my fish tank all the time. The actinics are only part of the light as I use 5500K 96W bulbs as primary veg light.

Priest said:

Interesting! Give it shot and tell us what happens

Click to expand...

for sure i will give full updates

have you tired the green blub during off hours?

green light does nothing they dont use the green spectrum

from wikipedia these are emitting decent UV, but it's UVA... not sure how much of that is going to be useful, but it certainly isn't hurting.

ricardezra said:

green light does nothing they dont use the green spectrum

Click to expand...

You might want to do more research

i have used the purple light from nuturelite an i thought it gave me abit more trich production as i used the same plant 1 under 600w hps an 1 under 300w red cfl 2700k warm white an 1 200w purple cfl 25000k bio-tropic an the 1 under the purple cfl deffinatly was more frosty i know some of you would say that every plant is different an acts to differant enviroments and yes your right but i still think the 1 under the purple cfl was much much more frostier than the other have a look at nlites.com they the sulphur plasma lights too

uuuuh why do you think when the lights are off when flowering you can use a green light and it wont effect the flowers? thats because marijuana does not use the green spectrum!

ill Padrino said:

You might want to do more research

Click to expand...

marijuana does not use the green spectrum do your research

nothingtodeclare said:

i have used the purple light from nuturelite an i thought it gave me abit more trich production as i used the same plant 1 under 600w hps an 1 under 300w red cfl 2700k warm white an 1 200w purple cfl 25000k bio-tropic an the 1 under the purple cfl deffinatly was more frosty i know some of you would say that every plant is different an acts to differant enviroments and yes your right but i still think the 1 under the purple cfl was much much more frostier than the other have a look at nlites.com they the sulphur plasma lights too

Click to expand...

i have notice that too but I only used the black light when the lights are off.im gonna used them the whole time and when lights off its like spitting up the spectrum giving them more of what they want

Actinics, and the mixes (probably what your purple bulb is) both give off some UV, as well as a high kelvin spectrum. I am not surprised you saw slightly increased results. UVB specifically has been linked to THC production, and the blue spectrum will still aid in flowering (all other things equal a plant flowered under heavy red's with some blue will produce better than a plant with no blue's in the spectrum).

Plants are green because they are reflecting that color back at you. This is the foundation of color theory, if something looks like a certain color to you that is because it is reflecting that color as opposed to absorbing it. Not to say it's ALL being reflected, or that every shade of green is reflected (just like the number line, there are an infinite amount of colors within a spectral range), but yeah, mostly greens do not get used. That's why you can work in a flowering room using a (true) green light, and you won't interrupt the flowering cycle.

Ya green light doesn't work buddy...plants are green...

kindkush89 said:

Ya green light doesn't work buddy...plants are green...

Click to expand...

no one but me use a blacklight?

ill Padrino said:

You might want to do more research

Click to expand...

If something is green its because that object is absorbing every color of the light spectrum except green, which is being bounced back (which is why we see it). A soft green "party" CFL from your local hardware store will be fine, and safe for your plants.

I tried it once many years ago, but I saw no considerable difference so I abandoned it. Give it a try though.

ill Padrino said:

You might want to do more research

Click to expand...

Actual color is a wavelength of light, and like the number line there are an infinite amount of numbers between any two values. Restrict it to whole nm's, and you still are left with a PAR range of ~665 nm's, or with the restriction, around 665 possible colors. In the sense that only one of those could be called green, you are correct, however being this pedantic is more confusing than helpful. The reality is that colors are reflected light wavelengths. Plant leaves appear green because green light is being reflected off them, and that light is not being used by the plant at all. Though there are certainly going to be spectra close to the greens reflected, which one might call green (or more properly a shade of green), the color you are seeing reflected back is not being absorbed by the plant.

In regards to other posts, photosynthesis is not what determines flowering. Another way to understand this statement is that plants use light for other purposes besides photosynthesis. For instance, flowering is induced by a hormone which is degraded very quickly by light. Other than both hormone degradation and photosynthesis both rely on light, the two have nothing to do with each other (except without photosynthesis the plant won't have enough energy to continue producing proper levels of hormones). I don't know if this hormone is degraded by spectra in the green range, however it doesn't really matter because the color of chlorophyll reflects the green, which prevents it from reaching the hormone within the plant.

If this is still not making a lot of sense, do some reading on the kelvin spectrum scale. This measures the heat signatures of different spectra radiated from a black surface. The descriptions will go a lot more into the science of light energy absorption and analyzing spectral lines.