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Oct 18, 2014 9:47 AM CST
|Great article/resource for us here at ATP. I enjoyed reading it, again, to refresh my memory for the long indoor growing season to come.
Oct 18, 2014 12:46 PM CST
|Useful information, Rick. Thank you for putting it together and posting it for the rest of us to benefit from your hard work.
If you never ask, the answer is always 'no.'
Oct 21, 2014 5:50 PM CST
|Thank you both!
Special thanks to Evan, who pointed out that "CFL" only applies to certain kinds of bulbs with built-in ballast. I went back and edited out the references to T-5 and T-8 as "CFL tubes".
Really, they are "fluorescent tubes using technology as modern and efficient as CFL bulbs use".
In a way, I'm sad that LED lights will knock out T-8 and T-5 tubes the same way they are knocking out T-12 tubes - slowly but inexorably. I wish I had some 2-tube or four-tube T-5 fixtures! But I am cheap, so I MIGHT buy some T-8s between now and cheap LED lights coming on the market.
I originally hoped to work this up into an article, but I couldn't document what I really wanted to say: that "Gro-lites" are just broad spectrum tubes with a fancy price and name added.
Maybe some "gro-lites" also have a wacky color balance, like "purple", but have no benefit to the plants equal to the increase in price.
I couldn't find good spectra for both kinds of tubes.
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