Question about HID lights

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IndaShade Kylertown, PA(Zone 5b) Oct 07, 2002

How does a lumen compare to a footcandle? Are they basically the same thing?

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Badseed Hillsboro, OH(Zone 6a) Oct 09, 2002

I wanted to know the answer to this too. LOL A lumen: http://whatis.techtarget.com/definition/0,,sid9_gci541730,00.html a footcandle: http://library.thinkquest.org/10015/cgi-bin/glossary.cgi?m=footcandle Found this: http://www1.electusdistribution.com.au/images_uploaded/photomet2.pdf

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Terry Murfreesboro, TN(Zone 7a) Oct 09, 2002

Thanks, Badseed. The first link made my eyes glaze over before I got to the second paragraph (and I remembered why I never considered majoring in EE.) The second link made me go back and re-read the first link. The third link confirmed what I thought I was reading ;~)

With that photo you posted on the ID forum, I'm starting to wonder what you're growing, lolol.

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Badseed Hillsboro, OH(Zone 6a) Oct 09, 2002

LMBO Brugs officer, just Brugs! Notice the B in those words! I read something on the Brug forum about 1000 W HID lights and it had me wondering about the different types of bulbs too. Can't say I have ever seen anything that high aside from halogens.

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IndaShade Kylertown, PA(Zone 5b) Oct 10, 2002

Well folks, I was terrible at math. If I light I wanted to buy was 25,000 lumens, and 1 footcandle = 1 lumen/ft squared, what exactly does that mean in terms of footcandles?

Thanks for looking all this stuff up Badseed. I used Google to try and find something, but I guess I wasn't typing in the right keywords or something.

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MaVieRose High Desert, CA(Zone 8a) Oct 11, 2002

hope this site can shed some light LOL!!! http://www.homestead.com/PALM_Doctor/palm15.html

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Starzz Newcastle, ON(Zone 5a) Oct 12, 2002

Mavie..you are amazing..I was just browsing this thread..and then...."there you were with a link" Wow!

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MaVieRose High Desert, CA(Zone 8a) Oct 12, 2002

i try and it's alway a pleasure to give a helping hand, whenever i can :).

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