I read this about fluorescent lights......Cool white is more blue, and is good for the vegetative stages of growth, and warm white light is more orange or reddish, and is best for the flowering stage......all i can afford right now is fluorescent lights so thats why im got question about them....so my question is good to have a cool white and warm white to grow from start to finish or change the light to warm white when im flowering and why is the more better....PLEASE help.....
I read this about Fluorescent lights
- Thread starter DUDUMANN
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Bonzing
Active Member
Hmm , i dont quite understand , what your question is , but if i understand it correctly ..
the cool white, is for when you want the plant to grow , and when you get a certain height, then youll change it to warm white, so the plant has more red spectrums, wich helps the plant Flower ( buds )
Blue spectrums = grow plant Red-Orange spectrums = flower ( bud ) the plant
dont forget, when you change the light cycle from 18hours light / 6 hours night , to 12/12 , the height of the plant, will Double the size .. in other words
when you use cool white,whenever you stop , look at the height, and imagine X2 as big, thats the end result youll have, while using the warm white in the end .
the cool white, is for when you want the plant to grow , and when you get a certain height, then youll change it to warm white, so the plant has more red spectrums, wich helps the plant Flower ( buds )
Blue spectrums = grow plant Red-Orange spectrums = flower ( bud ) the plant
dont forget, when you change the light cycle from 18hours light / 6 hours night , to 12/12 , the height of the plant, will Double the size .. in other words
when you use cool white,whenever you stop , look at the height, and imagine X2 as big, thats the end result youll have, while using the warm white in the end .
thanks hillcrest
cowboylogic
Well-Known Member
Yep, nice call Hill. And Dud a mix start to finish is best IMO. Just lean a bit cooler when vegging and warmer when flowering.
you want Daylight (6500 K) not cool white (4100 K) for veging HUGE difference in growth. https://www.rollitup.org/attachments/cfl-growing/240662d1226605588-5000k-vs-6500k-hortgraph2.gif
yes 6500k~ for veg and 2700k~ for flower. try and keep it within 300 points of that number.
so 6200-6800k veg and 2500-3000k for flower. but the exact numbers i stated above are the best spectrums / usable light per watt, etc.
SmeLLyTreeZ
Well-Known Member
I'll second this, in veg I don't think its as important to mix the spectrum up but when you begin flowering use something like 75% 2700k and 25% 6500k.
cowboylogic
Well-Known Member
Think of it this way. Spring and Fall sun is lower on the horizon, warming up. Summer sun is high and bright. Cool blue like the summer sky. Factor in morning and evening light is somewhat comparable to spring and fall light. Lenght of photoperiod per season. Summer seems to have shorter mornings and longer afternoons. Fluorescents have and can grow the dank. Play around and tune your garden.
Canabian420
Active Member
for veg you ATLEAST want 5000k up but try to make it 6500K you can acquire these at walmart at a cheap price..they come in packs of 2 usually.
not necessarily I've waited that long under HPS too some strains take that long if you had a short veg time (Sativa dominant ones in my experience)
I'd swap some daylights out for warm whites or better yet add some wrms and leave the daylights in there.
A friend of mune had beautiful stocky plants under 75 % daylight
grow space
Well-Known Member
Cool whites will work extremely well when it comes to vegging..used them at my first grow and still i am using them, even in flower, for nice even side lightning 
I f u can, use mixed spectrum all the way, like vegg how many fluros u can that are cool whites, add a lil warm ones as well...
I f u can, use mixed spectrum all the way, like vegg how many fluros u can that are cool whites, add a lil warm ones as well...