PUFF MONKEY said:
fair enough.....about how many watts worth do you veg with???? i'm asking because i want to figure out if in fact cfl's are "better" than tube type. if you have ever seen my floro veg light(T12) and what it does to plants, you'll understand....btw , my veg light is about 480-500w...i can totally see where cfl's would be the choice of "micro growers" where space is really limited, but other than that, i feel the tube type is better..
I think this is a situation where the right light depends on the scenario. I only have a 2.25 sqft area to veg in, and I am running (13W x 8) = 104W of CFL's for 6400 lumens, roughly the minimum for veging that area at a benchmark of 3000 lumens per sqft (I will eventually get a larger wattage CFL bulb class to use, I just can't find the right spectrum right now
). I do have floros as well where I do "legit" growing and in that application I love them, they cover the whole shelf nicely. Those are T8's and run 32W per tube and put out 2700 lumens each. I have 6 of those, so around 16,200 lumens covering a 6 sqft area, only 2700 lumens per square foot. And that is really all the overhead floros I can get in that shelf. I could get more intense tubes, but nothing approaching what I could do with CFL's based on packing them into a finite space.
So while the floros are more efficent, for pure packing lumens in a space you can get much higher light density with CFL's. You can get a 40W CFL bulb putting out 2800 lumens that take up about say 4 inches square with a basic fixture and some fancy wiring, so in my 4 foot x 1.5 foot "legit" space using a piece of fire-proofed board I could probably make a light board and pack over 50 of those in there, a whopping 140,000 lumens total for the same space, or 24,000 lumens a sqft. That is getting to the realm of impractical with the heat and whatnot
and it would make more sense to move to HID, (I'll say that before someone scanning the post jumps in and tells me my theoretical situation is stupid and I could use a HPS
) but physically possible.