Blog post: Fluorescent Bulb Types: Great blog article

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This thread is in reply to a blog post by RickCorey entitled "Fluorescent Bulb Types".
Name: Evan
Pioneer Valley south, MA, USA (Zone 6a)
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eclayne
Oct 18, 2014 9:47 AM CST

Plants Admin

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.
Evan
Name: Debra
Garland, TX (NE Dallas suburb) (Zone 8a)
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lovemyhouse
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. Big Grin
"Every life has a death, and every light a shadow. Be content to stand in the light, and let the shadow fall where it will." Mary Stewart
Name: Rick Corey
Everett WA 98204 (Zone 8a)
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RickCorey
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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