HPS vs. Induction + CFL flowering comparison

"Photon flux density actually is a measure of the rate of flow of light in a given period of time. It is measured in Lumens."

No, it is not measured in lumens, at all. Lumens is weighted at 555nm. Photon flux density is measured as umol/m^2/s-1.

"Also, published Flux Density rates of various light sources do not take into account the direction of the flow of photons"

Photon flux is a ray, and as such, straight line emissions from the source, and reflection from a reflector happens at the same angle at which it strikes the surface.

"With this in mind, a well designed T5 running very cool and being able to be very close to its target can actually be more efficient than a "hot" light that has to be many magnitude further away"

Can be in theory, in almost all practice, it fails. Also, do you understand orders of magnitude? Your use of the word hints that you do not.

"I may be new to growing, but I know my science."

Speaking as a research director, your science is totally flawed and incorrect.

Time to put my own hip waders on, it seems.

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Originally Posted by khyberkitsune

Speaking as a research director, your science is totally flawed and incorrect.

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I am not going to hijack this thread having an argument with you about this. If you wish to start a new thread we will discuss how your formula measures the weight of photons hitting a target, thereby counting photons, but no more here please. My apologies to vanduction... I am following your experiment with great interest. :thumbsup::thumbsup:

Emmie

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Originally Posted by khyberkitsune

Time to put my own hip waders on, it seems.

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:S2:


I call BS on all of it since I'm totally ignorant of what your talking about!

So until it's been hashed out in terms my ignorant ass can understand,..... I've got my waders! ;)


not trying to start a shitstorm,.... just trying to learn a thing or two from it all.




With any luck my girls will benefit from it..... and if not,... well they aren't any worse off than they were before this thread! ;) :greenthumb:

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Originally Posted by gypski

Ok, I have a 6 light T5, and I'm getting ready to start flowering some of my harem. Put some of the ladies to work. I'm thinking of doing a four/two combination. AMF, I'm going to get four red bulbs, and starting with either a red/white/red/red/white/red, or red/red/white/white/red/red sequence. Give me a scientific opinion on that please. I think some white is needed for growth too during flowering, but just not as much. And what you are saying is making sense as far as lumens and yield per lumen/square ft. :D

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I am not qualified to recommend how to grow using these lights yet as I am still in my first grow gypski. I will say that I am a firm believer that the T5 light is an efficient light source and in the proper circumstances it can be compared to any of the lights available to us. This is why vanduction's experiment is so interesting to me. I will further say that in my grow box I have one Sunblaze 44 in the veg area (all blue) and a Sunblaze 48 in the flowering area (all red) and have every hope in its ability to produce well in a carefully controlled SCRog canopy where I can remain very close to the buds. But that being said, I am a rank amateur in growing, and what I am doing here is simply an experiment based on what I am learning from those here on the forum who are much more qualified than I am.

Emmie

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Originally Posted by emilya

I am not qualified to recommend how to grow using these lights yet as I am still in my first grow gypski. I will say that I am a firm believer that the T5 light is an efficient light source and in the proper circumstances it can be compared to any of the lights available to us. This is why vanduction's experiment is so interesting to me. I will further say that in my grow box I have one Sunblaze 44 in the veg area (all blue) and a Sunblaze 48 in the flowering area (all red) and have every hope in its ability to produce well in a carefully controlled SCRog canopy where I can remain very close to the buds. But that being said, I am a rank amateur in growing, and what I am doing here is simply an experiment based on what I am learning from those here on the forum who are much more qualified than I am.

Emmie

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Ok, I got the SB 46, and you want to keep your plants at least 2+ inches away. the top growth will reach toward the light and burn the tips!! I have to check mine a couple times a day. I'm more interested in the lumen per sq ft because that what it was in the old days (10 years ago). And I too believe the T5 can match the 400HPS. so I'm flowering with my SB 46!! I'm debating getting the SB 24/4 so I can keep some clones going in another closet!! :D

Yeps, lets see how vanduction experiment ends. He simply put under test claim of half wattage of induction lamp equal to HPS.

For the moment it seems result not confirm such claim, but Ill wait grow finish before stating it. If result is negative, then it would time for discussing about how much light each option emits or what would be the right amount of induction watts to match results of a given HPS.

Good job, vanduction :thumbsup:

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Originally Posted by gypski

Ok, I have a 6 light T5, and I'm getting ready to start flowering some of my harem. Put some of the ladies to work. I'm thinking of doing a four/two combination. AMF, I'm going to get four red bulbs, and starting with either a red/white/red/red/white/red, or red/red/white/white/red/red sequence. Give me a scientific opinion on that please. I think some white is needed for growth too during flowering, but just not as much. And what you are saying is making sense as far as lumens and yield per lumen/square ft. :D

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I would need to know exact tubes you are using to say anything for sure. Im not following last development on T5s, but most red T5s Im aware of actually continues emitting blue and some red light. Some of them, noticeable amounts of yellow. By placing white and red T5s intercalated 1:1 or all at each side, for such number of tubes there going to be little difference between areas of the grow. Yes, different spectrum on each side, but not extreme differences at all.

But I think we are highjacking thread with this question, why about opening a thread on the topic?

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Originally Posted by emilya

I am not going to hijack this thread having an argument with you about this. If you wish to start a new thread we will discuss how your formula measures the weight of photons hitting a target, thereby counting photons, but no more here please. My apologies to vanduction... I am following your experiment with great interest. :thumbsup::thumbsup:

Emmie

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No need for a new thread when one simple link does it all.

Light and Plants

http://imgur.com/5HgI2.gif

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Originally Posted by canniwhatsis

I'm following this closely.

I've already got my hip waders out for trudging thru the BS.

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:wtf:...

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Originally Posted by Dutch Pimp

:wtf:...

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LMFAO at the attached thumbnail. Too freaking funny, DP! :S2: