Aquestion for cfl guys

Hubert

Well-Known Member
Which is better for vegging? Cool blue 4100K or Full Spectrum 5000K
Well the problem with the 'cool blue' is that 4100K is actually more of a yellow colour, blue is actually more like 8000K+ So out of the two of those bulbs I'd choose the full spectrum, 5000K...the 4100K will emit more of a yelllow than a blue (see scale below)
 

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johnnygreenseed

Active Member
OK So what are the ideal ranges I should be looking at for CFL bulbs? red and blue. I havent seen bulbs that high(16000k)or low(1800k) in the kelvin range.
 

zoezoezoe

Well-Known Member
I dont know which is better, but I used cool blue and my veg growth was amazing. I use a 125W cool blue for 2 weeks usually before switching to a bunch of warm CFLs for flowering.
 

asf2j

Well-Known Member
most definitely for veg, make sure you've got plenty of lumens/sqft. just got a bunch of new cfl's today at wally world. general electric sells cfls in a three pack 6500k, they call it daylight 6500k energy saver. 1600 lumens/bulb on the 26 watt cfl. i didnt think that was right so i got my light meter for my camera out and checked the bulb at about 2 feet away. i was right on. 800 lumen, at about a foot away roughly 1400.

so... 6500-6700 and up = great for veg.
 

GanjaManaga

Well-Known Member
is it possible to veg with 5 2700k bulbs? cos thats what im dong at the moment, they seem abit streched but they look healthy there like 4 days old and have yet to show the second set of leaves. i have order 2 6500k bulbs which shud be here in a couple of days.
 
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