Johnnycannaseed1
Well-Known Member
And that comment right there is why you are full of crap.
Anyone can go back and look at my thread and see the evidence... Heck what's your contribution Troll?
COB Spectral Quality Thread
- Thread starter MeGaKiLlErMaN
- Start date
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- Tags
- calculator cobs led photosynthetic
Anyone can go back and look at my thread and see the evidence... Heck what's your contribution Troll?
MeGaKiLlErMaN
Well-Known Member
Youre thinking about this wrong. Im saying if you take the information you get from the results. the CRI, wattage, and efficiency. you can get the optimal equation to the whole CRI vs lm/W.. So find the brightest cob with the best light output. Untill the test by Rahz the general consensus was that it was the 3500K 80 CRI. So Knowing that isnt the case we can at least find out why.
Im still waiting to see if this calculator puts 90 and 70cri ahead of 80cri 3000k, (you know as rahzs real world tests show). If it does I wont question the efficacy of this calculator. If it doesnt my original comment about this being simply theory crafting at its best stands...
Johnnycannaseed1
Well-Known Member
Johnnycannaseed1
Well-Known Member
Raging Stalk
Active Member
Ok nerds, here is a more real world test to determine your cob's efficiency. See how much a specific volume of water heats up over a period of time. Specific heat of water is 4.18 which means it takes 4.18w of heat to raise 1ml of water 1 degree celcius in 1 second.
Instructions:
1. Mount cob to aluminum container and set at current, eg 50w.
2. turn on and let temperature reach equilibrium between container and cob.
3. measure an exact amount of water (say 1 liter) and measure temperature.
4. Pour water into aluminum container and start a timer.
5. Put thermometer into container
6. Let water warm up for a period of time until temp stops rising.
7. Record temperature and time, in seconds to reach that temperature.
We can now figure out the joules (energy) of heat produced by the cob to warm the water. Joules are watts/second so divide the joules by the time. Take that number, divide it by the wattage you are driving the cob at, multiple the result by 100 and that's the efficiency of your cob to produce heat.
Voila a more accurate real world way to test. I knew that university degree would be useful at some point in life.
Instructions:
1. Mount cob to aluminum container and set at current, eg 50w.
2. turn on and let temperature reach equilibrium between container and cob.
3. measure an exact amount of water (say 1 liter) and measure temperature.
4. Pour water into aluminum container and start a timer.
5. Put thermometer into container
6. Let water warm up for a period of time until temp stops rising.
7. Record temperature and time, in seconds to reach that temperature.
We can now figure out the joules (energy) of heat produced by the cob to warm the water. Joules are watts/second so divide the joules by the time. Take that number, divide it by the wattage you are driving the cob at, multiple the result by 100 and that's the efficiency of your cob to produce heat.
Voila a more accurate real world way to test. I knew that university degree would be useful at some point in life.
Considering its one of the only tests available to compare this model to see if the model actually works, yeah Id say its a pretty important takeaway.Dear oh dear
Sorry to hear that is the only takeaway you are looking for
But really, what is so funny about that question? Is it because no one would ask to compare those two cobs? Is it funny because the model will likely not reproduce the real world results? Is it funny simply because youve thrown the troll label out and youre trying to now mitigate all the questions Ive posed in this thread regardless of their merit? Which is it?
I mean, like the OP said earlier, this may be important info to someone spending $7k on cobs. So if this model tells me 80 is better than 70 and my real world results would have been far better if I had gone with the opposite would it still be such a hilarious question in your opinion?
MeGaKiLlErMaN
Well-Known Member
I wouldnt go with these options at 1400MA but if you could afford to drive them at .4A then youre going to get some sick results.
Could you elaborate on this "optimal equation" to the whole "cri vs lm/w"? Honestly I didnt know there even was a CRI vs lm\w battle. I always figured the importance of lighting factors as intensity, followed by color temp followed by cri. If there's information out there that says otherwise, I would really love to be pointed in its direction.
Is this not a loaded statement? I mean what is the "best light output"? Brightest can clearly be quantified rather easily, but "best" is very subjective, is it not?
That general consensus was formulated primarily from theory crafting, right? Does this model help us figure out why that isnt the case or something? Confused how that statement does anything but back up my idea that actual tests are needed over all of this theory crafting.
The fact of the matter is, if there were actual tests backing this model up in regards to how plants grow rather than examining the lighting properties in a vaccuum, it would be a godsend model. Unfortunately we arent there yet.
Raging Stalk
Active Member
Who cares. We all know that LEDs get more efficient when you run them lower and that you can run more than one of them.
Therefore, the end game is simple, he with the highest cob density wins.
Therefore, the end game is simple, he with the highest cob density wins.
MeGaKiLlErMaN
Well-Known Member
If youre going by greengeenes light QUANTITY + light quality = the best light. Which is true to an extent, but thats the basic version. What Im saying is that If the work backwards from the CRI test results with all the data we would know what the best CRI/TEMP is out of those lights. So since we know the answer to the question already we just have to use this to work backwards. I just need to contact @Rahz for the data.
By best I mean out of what has been tested so far. It might have been through theory, but the 3500K was proven and people dont like change generally. This isnt in a vacume any more with actual data to go though.
Efficiency at producing photons and efficiency of photosynthesis are not equal.
Raging Stalk
Active Member
Of course not, but improved efficiency in either means that you are doing better.
Not necessarily... if your producing more photons more efficiently it doesnt really help you at all if the plant cant efficiently use that light for photosynthesis.
Raging Stalk
Active Member
Yes it does, it means you can reduce your overall power consumption for similar results.
Raging Stalk
Active Member
Sorry for off topic, I remembered my requests.
The entire Vero Gen7 line that hasn't been done yet, but mainly the Decor line:
1750k BXRC-17E10K0-C-xx-SE
2500k BXRC-25E10K0-C-xx-SE
Sad looking SPD chart in this pdf:
http://www.bridgelux.com/sites/default/files/resource_media/DS124 Bridgelux Decor Series on Vero SE Series Data Sheet Rev A 20161026_0.pdf
If you found a bridgelux spd chart for 3000k 90 cri that would be helpful as well.
The entire Vero Gen7 line that hasn't been done yet, but mainly the Decor line:
1750k BXRC-17E10K0-C-xx-SE
2500k BXRC-25E10K0-C-xx-SE
Sad looking SPD chart in this pdf:
http://www.bridgelux.com/sites/default/files/resource_media/DS124 Bridgelux Decor Series on Vero SE Series Data Sheet Rev A 20161026_0.pdf
If you found a bridgelux spd chart for 3000k 90 cri that would be helpful as well.
MeGaKiLlErMaN
Well-Known Member
Man Ill have to make a video... It takes a long time to run numbers... Yeah Ill do that alot sooner. I would rather not be the main source for getting the information out as I could be accused of skewing info. After I finish my harvest video Ill get on it. Just need Paint or photoshop and some common sense.
sixstring2112
Well-Known Member
I would love to see any and all data on the cree cxb 3590 36v 2700k 80 cri in both 1050ma and 1400 ma
In my own garden these fuckerz are doin work!!!
You Boyz need to stop all the clutter, its a good topic for discussion and if killa wants to run all these numbers lets give him a break on all the jibber jabber please.
In my own garden these fuckerz are doin work!!!
You Boyz need to stop all the clutter, its a good topic for discussion and if killa wants to run all these numbers lets give him a break on all the jibber jabber please.