Club 600

afrawfraw

afrawfraw

Well-Known Member
jusblazed said:
for all the HPS or MH people, this is not a thread to debate what your own personal thoughts on lumen are. IMO 6900+6900+6900+6900=27600 lumen. The specs of the bulbs changed from my title post. Being a photographer, understanding light and how it acts is part of the gig... Yes the inverse square law takes place here, just as it does with ANY OTHER LIGHT. If you looked into the cab walls you would see a difference between one bulb and 4. Trust when I say it is def 4 times as bright. If you look at an individual bulb shining at the wall, with 4 bulbs shining on it you see that it IS much brighter... I literally need sunglasses when playing with the config or I get sun spots on my eyes and cant see what im doing outside the cab in a normally lit room...
HPS or MH is not a magic light that manages to "penatrate deeper" at the same Lumen (note I did not say Watts it will take more watts for cfl to match HPS in lumen). Lumen are lumen are lumen no matter how you look at it. 27600 lumen in CFL is 27600 lumen in HPS. The major difference is the wattage, heat, wiring, and angle of view given. (ie stock cfl have no reflector). Which is why you need reflectors with cfl unless you are trying to spread out the light 360 among many stalks.
Some reading for you who don't believe the cumulative nature of light and how the beam pattern effects dispersion: http://www.luminousdiy.com/FAQ.htm
http://books.google.com/books?id=kxICp6t-CDAC&pg=PA769&lpg=PA769&dq=Are+lumens+cumulative?&source=bl&ots=yVfsYmYgLm&sig=VGI2nkLfr2cvVPC5tbR30rva5_E&hl=en&sa=X&ei=Gi8dT8a-NrH8iQKaz9XOCA&ved=0CFoQ6AEwBw#v=onepage&q=Are lumens cumulative?&f=false
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:clap::clap::clap::clap::clap::clap::clap::clap::clap:
 
DST

DST

Well-Known Member
I am not sure what this guys point is......do people say that 50k lumens is brighter on HPS than CFL's? or am I missing the point?
 
DST

DST

Well-Known Member
Grey Area for weed, Abraxas is quite nice to chill (I was there at the weekend with friends). If you like to have a smoke and have a beer the best place is the Cafe Nes, which is on the Nes (just off Dam square), that's my local.
 
jigfresh

jigfresh

Well-Known Member
I think I've been to Cafe Nes. If I have.. it's a real cool spot. Chill bar type environment. Probably a little cold to sit on the patio in 2 weeks, but that's nice. Right on a canal.
 
stoneyluv

stoneyluv

Well-Known Member
I've never been to nes, but i sure have had a brew or two at the dam square a couple times!!!! awesome city!

I'm sure you loca;s hate the tourism, but as a tourist it was very cool to walk along and hear 6 or 7 different languages spoken at one time!!! I love to travel and holland is on my top three of places i've been.

my little garden
 
afrawfraw

afrawfraw

Well-Known Member
DST said:
I am not sure what this guys point is......do people say that 50k lumens is brighter on HPS than CFL's? or am I missing the point?
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If a 1000watt HPS throws 100,000 lumens, then 3 1000watt HPS's throw 300,000 lumens, right? Or Wrong!? And intensity is the same according to his theory that lumens stack. Intensity and lumens are measured at the center of the tube. A CFL is a long twisted tube. So I was trying to explain that CFL's throwing 5,000 lumens, won't compare to a 1000 watt bulb, even if you run 4X250watt cfl's. Your total lumens will still be 5,000 lumens. It's just covering more area. This is why CFL buds are not dense. When they have a CFL that throws 60,000+ Lumens, I'll start listening...
 
jigfresh

jigfresh

Well-Known Member
I think that's wrong... but not sure. I think I remember reading from someone who knew their shit that lumens are not additive. Don't quote me, but I'm pretty sure. Apparently lumens aren't a very good way of measuring what it is us growers are interested in. There are lots of threads on it all. It's over my head and I only have one light, so I don't really care, lol. It is all interesting from a physics standpoint though.
 
duchieman

duchieman

Well-Known Member
I'm trying to figure out where this quote/post came from. I thought I missed something here on the 600 so I went back a couple of pages and nope, I don't see this here so, it must come from another thread. If that's the case, do you have a point or something you'd like to share with us? Because frankly, I don't think your telling anybody here anything they didn't already know. Now I can't assume that everybody has this knowledge so sometimes, when I run across little tidbits of information like this, I will gladly share it with people here at the 600 but I usually deliver it in a different way, not just slap it up on the wall and assume that everyone knows where I'm coming from.


Just to be clear, this is what I saw before the post was edited, as it relates to my reply.

If a 1000watt HPS throws 100,000 lumens, then 3 1000watt HPS's throw 300,000 lumens, right? Or Wrong!?
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afrawfraw

afrawfraw

Well-Known Member
jigfresh said:
I think that's wrong... but not sure. I think I remember reading from someone who knew their shit that lumens are not additive. Don't quote me, but I'm pretty sure. Apparently lumens aren't a very good way of measuring what it is us growers are interested in. There are lots of threads on it all. It's over my head and I only have one light, so I don't really care, lol. It is all interesting from a physics standpoint though.
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They do NOT stack. If this theory held any weight, auto makers would put 3 standard headlights in a beam, instead of engineering a HID lamp. Light towers would run on LED's, Etc. Lumens at the bulb bleed off as required by inverse square law. They are not "Carried" nor "Boosted" by other lumens near them. It appears brighter because there are more points of light, which penetrate our eyes more. But you're right, PAR (Plant available Radiation) is what we seek for plants. The closest culture to us would be salt water reef owners, who use lamps to help organisms, particularly plants, flourish in an artificial reef tank.
 
jigfresh

jigfresh

Well-Known Member
So... In conclusion. We should all keep our HID lights and not all switch over the CFL's.

Glad I didn't make that mistake.
 
genuity

genuity

Well-Known Member
as long as i can get around 60-70watt/sqf,im good.
i do not like to see any shade in my grow room,so adding more light bulbs/lumens/par/whatever.
i see it as adding up.
 
genuity

genuity

Well-Known Member
jigfresh said:
And the Gman returns!!!

Glad to see you bud.
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just getting things inline around my parts,but all is good.
about to smoke on some candydrop,and ice hash.

i see you had a blast over the pond,real nice pics jig,
i wish i could get out of the states,one day.
 
jigfresh

jigfresh

Well-Known Member
Glad to hear things are getting settled in. I did have a blast. Thanks for checking out the pics.

For the dry ice hash... I'm gonna make some today or tomorrow. Was wondering which bag I should use? 250, 180, 110, or 45. I think you guys said 180 last time, don't remember.

And... How much dry ice do I need to buy at the store? Couple pounds?
 
billcollector99

billcollector99

Well-Known Member
afrawfraw said:
If a 1000watt HPS throws 100,000 lumens, then 3 1000watt HPS's throw 300,000 lumens, right? Or Wrong!? And intensity is the same according to his theory that lumens stack. Intensity and lumens are measured at the center of the tube. A CFL is a long twisted tube. So I was trying to explain that CFL's throwing 5,000 lumens, won't compare to a 1000 watt bulb, even if you run 4X250watt cfl's. Your total lumens will still be 5,000 lumens. It's just covering more area. This is why CFL buds are not dense. When they have a CFL that throws 60,000+ Lumens, I'll start listening...
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Thats a myth that cfl's cause airy buds... I have seen and grown several plants with only cfls, and they came out rock hard ;)
 
billcollector99

billcollector99

Well-Known Member
jigfresh said:
Glad to hear things are getting settled in. I did have a blast. Thanks for checking out the pics.

For the dry ice hash... I'm gonna make some today or tomorrow. Was wondering which bag I should use? 250, 180, 110, or 45. I think you guys said 180 last time, don't remember.

And... How much dry ice do I need to buy at the store? Couple pounds?
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I did a run with the 120 bag jig, and I have to say the quality is much, much, much better than what comes out of the 220 bag ;)
 
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