Lighting Cob vs hps

[Rusty_Shackleford]

Are these gonna be for autos, photo veg or flower or all the above?

 

[Tommy boy]

I would use the light for everything. Right now I'm hooked on autos. I think I will go with the 3500k 90cri it seems like that would be good for veg and flower. I appreciate you guys helping me out with my questions. I can't wait to get this light built and running

 

[Rusty_Shackleford]

Let us know how it goes bud!

 

[pop22]

BUT........... the HPS PAR watts is reduced by reflector losses of up to 30% ( 20% average ), depending on reflector design. And a step up to an HLG240H-C1750 would put the cobs at about 62 watts, and put PAR about even with the HPS. And I'm willing to bet that even the 200 watt light will give a superior grow. HPS is dead tech. NO? Then why did Gavita sell its HID business?

400W HPS is 120-140 PAR W.
200W of 1212 (50W each) is around 90-95 PAR W.

So NO, 200W of LEDs will NOT replace 400W COBs.

 

[KonopCh]

BUT........... the HPS PAR watts is reduced by reflector losses of up to 30% ( 20% average ), depending on reflector design. And a step up to an HLG240H-C1750 would put the cobs at about 62 watts, and put PAR about even with the HPS. And I'm willing to bet that even the 200 watt light will give a superior grow. HPS is dead tech. NO? Then why did Gavita sell its HID business?

Yea, yea... any light will grow weed. Even 1 dollar normal bulbs. This is not the point.
It just piss me off that someone compares 400/600W HPS with 200W COBs. As I said, I have it too, they are amazing, new tech. But we know numbers from datasheets, from sphere testing etc. and we can compare them. And as I said, 90-95 PAR W is not the same as 120-140 PAR W. It's +30% more.
But yes, coverage, heat, efficiency, spectrum... they are all on the COB side.

 

[Hippy_BiotabsF70]

Even if HPS is 30% efficient, it gives 120 PAR W. And it is.
And yes, on paper and in sphere tests.

Still more PAR W than 200W of 1212. Sorry guys, I also have these COBs but I cannot past this what some of you saying "200W of 1212 will be better than 400W HPS". No!

You can see numbers and text from Gavita here:
- https://chilledgrowlights.com/indep...ro-1000-de-hps-at-1000w-goniometer-lab-report
- http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0099010#s3

Numbers schnumbers mate. Par watts is only part of the story. Many other factors come into play here. USEABLE par watts would be better.

I think if you look around this very forum you will find quite a lot of people now who are getting awesome results with 1212s. I realise you are struggling to accept it, but the proof is all over this forum, many times over. It can't be disputed.

All in good spirit mate, no malice intended at all

 

[Hippy_BiotabsF70]

Rather than comparing numbers on paper, wouldn't it be better to compare evidence, i.e., actual grows on here mate?

 

[KonopCh]

Rather than comparing numbers on paper, wouldn't it be better to compare evidence, i.e., actual grows on here mate?

Look at my journal, you'll see some amazing plants under 1212 and CXB3590.
But... it's hard to compare side by side, every grow is different, too many factors here.

I am over here, don't have energy. Just look on another forum if you're interested in COBs, guys.

 

[Hippy_BiotabsF70]

Look at my journal, you'll see some amazing plants under 1212 and CXB3590.
But... it's hard to compare side by side, every grow is different, too many factors here.

I am over here, don't have energy. Just look on another forum if you're interested in COBs, guys.

I use cobs myself mate. Wouldn't even begin to consider anything else to be honest. Maybe quantum boards when the cobs go bang. 1212s are giving me awesome results that I think I would definitely struggle to get with anything else.

 

[Rusty_Shackleford]

Yea, yea... any light will grow weed. Even 1 dollar normal bulbs. This is not the point.
It just piss me off that someone compares 400/600W HPS with 200W COBs. As I said, I have it too, they are amazing, new tech. But we know numbers from datasheets, from sphere testing etc. and we can compare them. And as I said, 90-95 PAR W is not the same as 120-140 PAR W. It's +30% more.
But yes, coverage, heat, efficiency, spectrum... they are all on the COB side.

But as pop said, you pretty much negate that with reflector losses. And the rest of the led spill ( less heat more coverage yada yada). Not to mention the 400w aren't the most efficient stacked up to 600 and 1000w hps. But I agree more testing is needed, but the facts remain that if leds arent superior, it's pretty damn close, for all the benefits leds provide. I know it's hard to believe, but the tech is finally there. Let's all just smile, enjoy it and grow and smoke low wattage greenery :smoking: