kmog33
Well-Known Member
Here's the 80 cri and still about 10lpw under the v22s?
V22 @ 1050 = 157lpw
Clu 1212 @ 1080 = 153lpw
So not quite ten.
COB Manufacturers other than CREE or BRIDGELUX
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V22 @ 1050 = 157lpw
Clu 1212 @ 1080 = 153lpw
So not quite ten.
Malocan
Well-Known Member
did you read his post'? if yes i would read again. i think he is correctHere's the 80 cri and still about 10lpw under the v22s?
V22 @ 1050 = 157lpw
Clu 1212 @ 1080 = 153lpw
So not quite ten.
The lm/w from vero is at Tj=25C at datasheet and at the pdf from citizen the lm/w is at Tj=85C
BuddyColas
Well-Known Member
Ok...about 4 lm. So a tie. There is more variation than that between cobs of same make. The v22s are set for a bump in June. What are getting the v22s for?Here's the 80 cri and still about 10lpw under the v22s?
V22 @ 1050 = 157lpw
Clu 1212 @ 1080 = 153lpw
So not quite ten.
kmog33
Well-Known Member
14.25 w 3 shipping. I initially missed the 80 cri versions of the 1212s but that kill it for 12.50. The vero 29 still should be a bit better but twice the price. V
BuddyColas
Well-Known Member
You may have mentioned this, but how did you mount your v22s?
JorgeGonzales
Well-Known Member
Yes, Bridgelux has higher numbers because they are using Tc=25C. Notice how much higher the lumens are in the 25C column for the Citizen.
This chart explains it:
That's not really the whole picture, because forward voltage changes as temperature and current change, which throws off the watts and lumens per watt calculation. This is why something like the Cree PCT, or Citizen spreadsheet are so damned helpful. It's hard to nail this stuff down since everything affects everything,
But yeah, the 1212 is at Tc=72C when its junction is at 85C, so you can see from the chart thats about a 9% loss.
This chart explains it:
That's not really the whole picture, because forward voltage changes as temperature and current change, which throws off the watts and lumens per watt calculation. This is why something like the Cree PCT, or Citizen spreadsheet are so damned helpful. It's hard to nail this stuff down since everything affects everything,
But yeah, the 1212 is at Tc=72C when its junction is at 85C, so you can see from the chart thats about a 9% loss.
JorgeGonzales
Well-Known Member
Tie my foot. I've run the numbers till I'm blue in the face and the Vero 29 loses by a smidge across the board.
kmog33
Well-Known Member
Thermal paste
BuddyColas
Well-Known Member
And did you use a holder or tape?
kmog33
Well-Known Member
I tape down the wires next to them but no holders.
BuddyColas
Well-Known Member
Me too. I just kapton tape my Vero 29s...works good.
ScaryGaryLed
Well-Known Member
Well, I'm new here, but OLD to LED... anyhow, for a cheap setup i used some 100w cob ER chen from amznDOTcom and they did a good job for the space i have, not impressive, but more impressed than the vero29 3500k i'm using now. so go FIGURE, it's NOT about the amount you spend but it's about the quality of light, the ER CHEN from Carol Zuo ... Epistar did a great job for 2 at ~80watts each. and the smoke great. they had very good penetration. here is some pictures.
the setup, water cooled 100W cobs from epiled on amznDOTcom, I DON'T support the seller or the brand or anything, it was the cheapest cob i could afford at the time. that's why i used them 3500k with about 8000-9000 lumens as per description. used at ~75-80W a piece. 29.5V @ ~2,5Amps (they seem to run best here, less heat and equal amount of light, as if you ran at a higher voltage, there was no benefit, so I left it there.) And again this was a cheap setup, you can see the coat hangers, and Styrofoam cup spacers.... survival blanket mylar... LOL.
the results, this a few weeks before the harvest was done. see the penetration as all the plants even the lowest ones about 1ft off the ground were full of trikes. they all were equally potent. BTW this is all from bag weed from where I'm located. it's mostly colombian and jamaican.
This is the temperature 47.6C of the LED section, where the light comes from, it's water cooled so don't fooled by lower temperature. I'm sure this helped to boost some lumens out of these babies. I used CLIPS to hold the LED cobs on the heatsinks, it was a damn good solution. Applies a lot of pressure and holds them firmly and allows you to attach easily.
As you can see the temperature 39.5C of the BACKSIDE of the heatsink. LOW again, they are water cooled. PC power supply....
I ran these at that distance, 12CM, from the led, NO ISSUES when in Flowering, this plant genetics love the light they can get.
Better overall view of the distance vs penetration vs buds. I did not know these plants genetics so I let them grow as they would no topping or pruning of any sorts, some produced more some less, in the end about a good ounce dried. It was all TOP SHELF.
Bud shot, just look how beautiful the leaves changed and the production of Trikes was great. Overall all had great taste, great HIGH and excellent smell, burned well also..
SO there you have it, you don't need expensive LED's to make a some good smoke, as this EPILED was great, I ordered more after seeing the vero29 is not really good for this genetics I fee bad for that but it's all good. I'll see what happens in the next 30 days and put up results for the same genetics. This however was a great experience for first time using cheap COBs that didn't break a bank and that could actually be improved upon, may be 4 of these at lower wattage will produce some good bud too with some topping. I will be using 6x of these leds next time at 25w each
Thanks for looking, hope I didn't HI jack this thread just wanted to show what I did with 2x 100W COB epiled $20 @ aM@znDOtcom. keywords=erchen+100w
I guess that's what people want to see anyhow.
Happy Budding!
thought i would conclude this with one last picture of what the plants saw at night. that is how i mounted the LEDs on the heatsink then on the closet rack with coat hangers. pretty simple, i say. and Yes... that is a green LED strip of smd lighting up the place in the night cycle.
the setup, water cooled 100W cobs from epiled on amznDOTcom, I DON'T support the seller or the brand or anything, it was the cheapest cob i could afford at the time. that's why i used them 3500k with about 8000-9000 lumens as per description. used at ~75-80W a piece. 29.5V @ ~2,5Amps (they seem to run best here, less heat and equal amount of light, as if you ran at a higher voltage, there was no benefit, so I left it there.) And again this was a cheap setup, you can see the coat hangers, and Styrofoam cup spacers.... survival blanket mylar... LOL.
the results, this a few weeks before the harvest was done. see the penetration as all the plants even the lowest ones about 1ft off the ground were full of trikes. they all were equally potent. BTW this is all from bag weed from where I'm located. it's mostly colombian and jamaican.
This is the temperature 47.6C of the LED section, where the light comes from, it's water cooled so don't fooled by lower temperature. I'm sure this helped to boost some lumens out of these babies. I used CLIPS to hold the LED cobs on the heatsinks, it was a damn good solution. Applies a lot of pressure and holds them firmly and allows you to attach easily.
As you can see the temperature 39.5C of the BACKSIDE of the heatsink. LOW again, they are water cooled. PC power supply....
I ran these at that distance, 12CM, from the led, NO ISSUES when in Flowering, this plant genetics love the light they can get.
Better overall view of the distance vs penetration vs buds. I did not know these plants genetics so I let them grow as they would no topping or pruning of any sorts, some produced more some less, in the end about a good ounce dried. It was all TOP SHELF.
Bud shot, just look how beautiful the leaves changed and the production of Trikes was great. Overall all had great taste, great HIGH and excellent smell, burned well also..
SO there you have it, you don't need expensive LED's to make a some good smoke, as this EPILED was great, I ordered more after seeing the vero29 is not really good for this genetics I fee bad for that but it's all good. I'll see what happens in the next 30 days and put up results for the same genetics. This however was a great experience for first time using cheap COBs that didn't break a bank and that could actually be improved upon, may be 4 of these at lower wattage will produce some good bud too with some topping. I will be using 6x of these leds next time at 25w each
Thanks for looking, hope I didn't HI jack this thread just wanted to show what I did with 2x 100W COB epiled $20 @ aM@znDOtcom. keywords=erchen+100w
I guess that's what people want to see anyhow.
Happy Budding!
thought i would conclude this with one last picture of what the plants saw at night. that is how i mounted the LEDs on the heatsink then on the closet rack with coat hangers. pretty simple, i say. and Yes... that is a green LED strip of smd lighting up the place in the night cycle.
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ScaryGaryLed
Well-Known Member
i used epoxy on the plastic edges it's simple and cheap, just make sure you leave some breathing space for the fresh thremalpaste and run them hot so they stick on well.... just a tip or suggestion...
BuddyColas
Well-Known Member
Your cooling and mounting are a first for me. Very ingenious. Any type of thermal protection in place if the pump fails? And you said the China cobs outperformed the Vero 29s at 3500K...same wattage to both?
ScaryGaryLed
Well-Known Member
at the same stage in the grow yes. the only thing different now is that i'm using walmart growbags and plastic mesh baskets and have less plants. same genetics and no clue WHY the vero29 3.5K are under performing if they are producing more lumens. I have 4 vero 29 3500K at ~36.4Volts at ~5.2Amps around 47W each... So almost the same a little more power now.
I scrogged the plants (2 of them), and surely it's not stress related, this setup used an HLG 240 30V unit, with a boost convertyer to get the 36V, it's what i had sitting around. I'll post a picture later on so you can see the setup, it's pretty nice too, but just not performing how I want it to. I'm debating on just disconnecting 2 of the vero 29 and letting the current run through the other 2. I think the INTENSITY of the LED light has to do with the growth, they are even closer to the plants than the cheap cobs.
The cheap cobs, I could never enter the room without eyeprotection, the light was just way too intense, would hurt / damage your eyes. I think these plants like that, as the leaves were bigger and didn't seem to turn yellow so quickly. you have to understand this setup above was using pots about 1/2 gallon, now i'm using 5 gallon bags in baskets and the roots are amazing just the plants are not putting out as much. it's confounding, maybe i just have to sit back and wait.
All i know the deal was good on those chinese LED's and ended up ordering more because the price came down to $15 each and i found some cheap heatsinks at around $10 each, i want to do a passive setup.
The pump is an aquarium pump in that setup, never had a single problem, it was $10 and it was the smallest one I could find, barely pushes water through.
When i did the new vero setup, i put a larger pump, thinking it would be a good idea, it was not. it actually did fail once, got stuck somehow. I did not notice for many hours, but when I did the only thing that got hot was the tray I had them attached to, and there is a cooling fan blowing on the boost converter, so actually it is not hot. I think it was like 60C or around there, which is WAY in the limits of operation without issues.
We'll see what happens, I'll make a post once that cycle is completed.
But so far the china cobs are decent and especially for the results and price.... just my experience with anything else than cree or vero. I'll stick with the cheap china cobs, honestly.
BuddyColas
Well-Known Member
I may have misread this but you are running you Chicobs n Veros in parrellel on same supply?
ScaryGaryLed
Well-Known Member
no,I used a CPU power supply and boost converters to power the china cobs.
i am using another setup now with exclusively vero 29. running off a meanwell hlg240-30 w/ boost converter to ~36.4V, it fluctuates a lot, 4 vero in parallel. I'm not happy of the performance of the vero 29 3.5K, it's good, but nothing compared to what i was using before with the china cobs. Those china cobs are actually better IMHO as the light is more intense (had to use sunglasses to enter the area) and cheaper, where i save on the cobs is more than the power consumed, so it's Cheaper in the long run. as they only get cheaper and were actually excellent for these plants. they liked it much more, the leaves would stay perky even when sleeping.
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BOBBY_G
Well-Known Member
Reading this reminded me of that baseball team. you know....the Chicago Cobs?
ttystikk
Well-Known Member
They'll never win the pennant.
claypipe69
Well-Known Member
If they cant be bothered to answer your question, what does that say about their customer service ? I would look elsewhere..