The Hemp Goddess said:The T5s put out the same (or slightly more) lumens per watt as a MH, unlike other fluoro tubes. In addition to being able to put the light within an inch or so of the plants, like Roddy mentioned, it also spreads the light more evenly and runs cooler. I believe that both of these factors contribute to the tight internodal spacing.
BWD--just for your information. Fluoro tubes come in T12, T8, and T5. The number behind the T denotes the diameter of the tube in 8ths of an inch--T12s are 12/8th or 1-1/2", T8s are 8/8" or 1", T5s are 5/8".
The metal Halide puts out light at around 5100k which is in the middle of the visible spectral block. This light has a lot of green light in it, as well as other colors, but plants with strong green leaves will not use much of the green light if any. Not only is that wasted energy, it doesn't serve the plants. The other colors present in the MH light (from my experiment) seemed to help the plants grow massive root balls, as compaired to the same 3 strains grown under T5s(which put out a tighter band around 6500k), but the lack of light energy caused the plants under the MH to stretch considerably.
mountain man said:You are ridiculous....
Now let's zero in on the flowering spectrum, invent some nice cool T5s that emit it,
Roddy said:If both are 6500k and the same amount of lumens striking the plant canopy, they should grow the same. No matter if they are t-5's or mH or am I miss understanding this?
Costs are more for using the MH, it's hotter than T5's and cannot be put as close to the plants....these small differences are likely what make the T5 such a good choice for many of us! If all other things are equal, that is.
sidewayz said:yeah I got lost and way out to left field on this still listen and learning bout the lumens and heat thing.i kno that im puting out 20k lumes in a 2x4 closet sounds rite as to that I can grow two plants with the t-5.
pcduck said:You have no idea what I was talking about.
But there again, nothing new!!
sidewayz said:I like the t5 I have it bout 2inches above my plant I can feel some heat off of it I closed of my ac duct to the door opened with a small fan going. I bought the t5 for space and was in my price range and my electric bill went up only 10 bucks. im still looking for a flowering flouro by agrobrite. thanks all im learning alot
sidewayz said:wow I got it now thats why everyone uses hps for flowering for the lumens. prety muc im not gona have tite buds just airy stragly buds. thanks thg
Roddy said:I understood just fine. An idea and suggestion, though, if you don't think I understood, explaining would go a long ways, surely much better than merely dismissing and slamming?
I sure hope you don't start this one into a battle, too.
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