Gro-Lux bulbs ...
http://www.buyplantlights.com/...
"This bulb was developed for accelerating growth in greenhouse grown crops. It is best used in situations where plants receive some sunlight, as in a greenhouse or near a window. "
I couldn't find a lumens rating for a Gro-Lux bulb, but other T12s I found ranged from 2,000 lumens to 2,600 (initial lumens for a fresh bulb). (48" T12 tubes).
T8 and T5 tubes can be found that are much brighter than T12s.
Just speculating, but IF Gro-Lux has a fancy spectrum at the expense of raw brightness, the seedlings might not now be getting the brightness they want. Just speculation.
http://garden.org/blogs/view/R...
Fluorescent Bulb Types
Color, Spectrum or "Temperature"
Page down to near the end.
I left it as a "blog" rather than an "idea" since so many sources say different things about lights, and I never did find good un-copyrighted spectra showing what I wanted to show about "broad spectrum" tubes with tri-phosphor coatings to "spread out" narrow spectral peaks. "Broad spectrum" tubes might be the exact same thing as expensive "grow tubes"
For starting vegetable seedlings, I think it's all about intensity, not much about spectrum unless you go "too red".
Shoe said:
>> Sorry to be so long-winded. (I was giving Rick Corey competition~!)
I agreed with everything you said, it was right on. But it would have taken me many more words to say the same things!
The length of your post explains why I was hitting my keys but not getting any letters on-screen. You used up all the electrons!
