Help me decide on LED

G

grow465

Member
FranJan said:
Helio is in a different league but that doesn't make them better than a proper COB rig...
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okay so are you saying that COB > all other leds? why? The sol9 i mentioned earlier uses 9 100watt COBs. Is this unit also better than all other non-COB leds?
I keep seeing Cobs have a very high rate of failure especially in models with high wattage input.

Edit- I see from a previous post that the quality COB chips are CREE CXB3590/3070, CitizenCLU, or VERO29/10. I assume most retail lights do not use these chips and that is why DIY kits are so highly recommended?
 
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G

grow465

Member
If there is something I need to read please link it. Im willing to put in the effort to make my own decision I just need to know I am making the best decision for my situation. And not getting sold on some gimmick - like adjustable from your phone.
 
a mongo frog

a mongo frog

Well-Known Member
grow465 said:
If there is something I need to read please link it. Im willing to put in the effort to make my own decision I just need to know I am making the best decision for my situation. And not getting sold on some gimmick - like adjustable from your phone.
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So you look around this site you will see grows of people doing over a pound off lets say a little over 400 watts. This is from cob leds. Theres like 10 people doing it on this site. A few people have done it with less on a double harvest. Dude this all boils down to how good can you garden? If your really willing to drop some racks, get the cobs man. Get 750-800 watts worth and you will probably shit yourself. And this is coming from an hps guy, but the grow shows are all over this site.
 
Airwalker16

Airwalker16

Well-Known Member
grow465 said:
okay so are you saying that COB > all other leds? why? The sol9 i mentioned earlier uses 9 100watt COBs. Is this unit also better than all other non-COB leds?
I keep seeing Cobs have a very high rate of failure especially in models with high wattage input.

Edit- I see from a previous post that the quality COB chips are CREE CXB3590/3070, CitizenCLU, or VERO29/10. I assume most retail lights do not use these chips and that is why DIY kits are so highly recommended?
Click to expand...
Ding ding ding ding ding!
 
G

grow465

Member
If I had a single hobby I could buy preassembled I would be so happy.
This question may be best answered with a link to somewhere. But.
It is my understanding that leds output light exponentially when you increase power.
With that in mind what is the recommended wattage percent to run it both "cold" and bright?

seems alot like building a computer. kinda. So ill just wire 6 Cree3590 (137watt) in series together and toss a (400w-800w??) meanwell power supply on it? then toss some cpu coolers and thermal paste on top?
are there any specs to match between the COB and the PSU or is it just wattage? Is impedence a factor when wiring all these chips together?

This has probably been asked a million times so feel free to link me.
 
Rahz

Rahz

Well-Known Member
PPF is umol/s. Micromoles per second is the Photosynthetic Photon Flux, just two different ways of saying it. The PPF for each lamp is listed on the product pages. The T4-2100 is a 300w lamp providing 2.3 umol/j (also 150 par watts at 4.6 micromoles per radiant watt) = 690 umol/s
 
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