High power COB -vs- hps vertical shoot out

ttystikk

ttystikk

Well-Known Member
jafro daweedhound said:
Being brave enough to try new things is what sets some apart from the crowd. Trying new things will bring about innovation and take the industry to new heights.
Click to expand...
Someone mentioned a good point about the OP's COB setup; they seemed pretty far from the canopy for not having any lenses.

It just takes one detail like this one to skew the results, so careful attention to detail is essential.
 
jafro daweedhound

jafro daweedhound

Well-Known Member
ttystikk said:
There's this new system that will light your farts on fire, but at 90% efficiency...
Click to expand...
One guy got 100% efficiency doing that..... but suddenly he felt something hairy was in the back of his throat. Luckily he swallowed hard and his assholes is back where it should be again.....
Just goes to show not everyone can implement efficiencies productively ...:fire:
 
jafro daweedhound

jafro daweedhound

Well-Known Member
legallyflying said:
You guys that are saying that A. I have a round plant and B. It is a dense canopy are completely and utterly fucking retarded.
Click to expand...
I think your idea is good for a couple of reasons. First off you are thinking outside the box and inside as well literally - what if you were able to focus the COBs direction downwards slightly instead of a vertical projectorry Perhaps 25 - 30 degrees downward. Lifting the entire unit higher as well.
Just thinking out load...
 
Last edited:
legallyflying

legallyflying

Well-Known Member
TastyNugs said:
I may have missed something, but the driver on page 2 is .7A. 12 cobs and 4 drivers, that's only 150w each, 600w total?

108k lumens with the cobs, 145k with the vert hps?
Click to expand...
My understanding that the drivers were pushing 200 watts each.. so a total of 800.

As I stated before, I know next to nothing about led and reached out to tyystcik for recommendations.

One thing I did see is that there is considerably less stacking with the led. I understand this is due to the individual plants themselves and veg conditions but if I'm only pushing 600 watts.. that is kind of fucked!!!
 
legallyflying

legallyflying

Well-Known Member
One more thing about bare bulb vert
.yes.. 360 light output. BUT each plant...one per side of the HPS is only getting 25% of the light.

So my conventional thought was throw about 200 or so watts of LED per side of the plant.

The led chips output at 120 degrees so I placed them 12" from the plant. 12" at 90 degree would be 24" lighting swath. So I figured 120 would illuminate the 34" wide screens.

I would like to know how much wattage I'm pushing. We are still 3 weeks out, I'll post pics later.
 
legallyflying

legallyflying

Well-Known Member
I love how getsoutalive can't understand that vert or horizontal makes no difference.

So I trolled his profile.. and he is boasting about bottom feeding in coco with wicks as winning.

Lolololol. Yeah brah, you are absolutely killing it

Pick up a physics book, you just may learn something.
 
C

churchhaze

Well-Known Member
legallyflying said:
Yo bitches,
So ttystickk finally convinced me to give the new cree COB a try. Since we grow vert to maximize sq ft. In our warehouse I built a fixture designed to be used in a vertical setting... ergo omni directional light.

Using cxb 3590 3500 80? CRI chips and 200 watt meanwell drivers. 12 chips total, 18" long and 4.5" wide heatsinks.

Therefore, you end up with the 800 watt tower of power...
Click to expand...
Those drivers will put out 700mA and will vary voltage output between Vmin and Vmax to regulate the current at 700mA.

Each cob drops about 70V at 700mA, so ~49W (P=IV). There are 3 cobs per string, so each string dissipates ~147W. There are 4 strings, so you're only dissipating about 588W, not 800W..

You can not simply add up the rated wattages of the drivers to find out how much power is dissipated. That only tells you the maximum power rating of the drivers, not how much power they're using. Go measure the voltage across the 3 cobs using a multimeter and multiply it by the supply current if you want proof, or plug the drivers in a kill-a-watt meter.
 
T

TastyNugs

Member
Yeah I think that's 600w total, which would explain the poor performance. 4 more cobs at 50w each puts it to 144k lumens, that'd be a pretty even comparison with a 145k 1000w bulb. Grab a kill a watt meter and check what they're pulling at the wall.


For distance from canopy, Cree cobs are 115°, Pythagorean theorem puts 50% light output at 19" from the center of the cob if 12" high.

Personally I've gone from an overhead 600w hps to a 340w PLC, and lux readings are a bit higher with the led fixture, but I also had a cheap eBay hps reflectors, no telling how much light I lost to that thing. I would think if it were 144k lumens of cob it'd be a bit better than 145k lumens of hps.
 
G

getsoutalive

Well-Known Member
legallyflying said:
I love how getsoutalive can't understand that vert or horizontal makes no difference.

So I trolled his profile.. and he is boasting about bottom feeding in coco with wicks as winning.

Lolololol. Yeah brah, you are absolutely killing it

Pick up a physics book, you just may learn something.
Click to expand...
Just so we are straight.
You start a thread called "High power cob vs hps vertical shootout."

I try to explain that the output pattern of each leads to a very difficult comparison for the cobs and they won't be able to compete.

You go off on a rant giving me a math lesson about how you are maximizing your volume. Great, but nothing to do with your lighting choices.

Your partner who designed this mess, just laughed and told me I don't know what I am talking about, cause obviously he nailed this.

Turns out I was exactly correct. This design sucks for apparently more than just placement reasons as you don't even know how many watts you are running.

Then, you go through my profile and find a post in a thread asking about passive hydro and wicking to troll me further.

Just wow.
 
ttystikk

ttystikk

Well-Known Member
legallyflying said:
One more thing about bare bulb vert
.yes.. 360 light output. BUT each plant...one per side of the HPS is only getting 25% of the light.

So my conventional thought was throw about 200 or so watts of LED per side of the plant.

The led chips output at 120 degrees so I placed them 12" from the plant. 12" at 90 degree would be 24" lighting swath. So I figured 120 would illuminate the 34" wide screens.

I would like to know how much wattage I'm pushing. We are still 3 weeks out, I'll post pics later.
Click to expand...
We'll help you get this thing figured out, that's a promise!
 
legallyflying

legallyflying

Well-Known Member
getsoutalive said:
Just so we are straight.
You start a thread called "High power cob vs hps vertical shootout."

I try to explain that the output pattern of each leads to a very difficult comparison for the cobs and they won't be able to compete.

You go off on a rant giving me a math lesson about how you are maximizing your volume. Great, but nothing to do with your lighting choices.

Your partner who designed this mess, just laughed and told me I don't know what I am talking about, cause obviously he nailed this.

Turns out I was exactly correct. This design sucks for apparently more than just placement reasons as you don't even know how many watts you are running.

Then, you go through my profile and find a post in a thread asking about passive hydro and wicking to troll me further.

Just wow.
Click to expand...
Oooohhhh K. You are the man!!

You see, one of us can just thrown a 8-900 dollars at something just for shit and giggles and one of us is bottom feeding coco pots. Your absolutely wrong about vertical LED and it's absolutely comical that you don't get it.

You go keyboard hero. Let's see some pictures from someone that has their shit so Oooohhhh dialed.
 
ttystikk

ttystikk

Well-Known Member
legallyflying said:
Oooohhhh K. You are the man!!

You see, one of us can just thrown a 8-900 dollars at something just for shit and giggles and one of us is bottom feeding coco pots. Your absolutely wrong about vertical LED and it's absolutely comical that you don't get it.

You go keyboard hero. Let's see some pictures from someone that has their shit so Oooohhhh dialed.
Click to expand...
Haters gonna hate, mostly because they're so terrified of failure themselves they can't stand the thought of anyone trying something new.

He's the kind of troll the ignore button was invented for, he's been on my ignore list forever for exactly the same shit. So HE isn't learning anything, but I believe we can learn from initial missteps and make your COB LED project the success it can and deserves to be.

Take @REALSTYLES advice about rewiring the rig for a few extra COBs and that's good for a third more light right off the bat.

Since you're running flat trellis panels, I'm not sure lenses or reflectors will make much difference, so long as the light leaving the COB will hit canopy over at least a120 degree spread.

I still think you need to make the box, and call it;
  • Nomad, a sentient robot probe in the Star Trek episode "The Changeling" (1967)
Lol
 
legallyflying

legallyflying

Well-Known Member
Stephenj37826 said:
Also 12 chips 800 watts on hlg185????? Something is terribly wrong with this build.
Click to expand...
What's wrong with this is that you jump into a thread, spew garbage from some other nonsense thread, and can't even bother to look at the very 1st post in this thread that shows exactly what is going on.

You diss the build in one post and the very next post ask what the details of the build are
What's embarrassing is that you are an advertiser and this is how you roll???


ANYWAYS, I'm looking for suggestions from those in the know. Maybe lenses on the chips?
 
legallyflying

legallyflying

Well-Known Member
Best thing boutique this thread so far... remembered the ignore button. Lol.

What's this shit about 50% of light wasted? My cobs are 12" from the plant. I measured, like 4 times, and put references lines on the hangers if they got bumped. Belive me, we are VERY detail oriented around here. Too much money on the line not to be. I just opened this month's power bill... $9,425. :(
 
ttystikk

ttystikk

Well-Known Member
legallyflying said:
Best thing boutique this thread so far... remembered the ignore button. Lol.

What's this shit about 50% of light wasted? My cobs are 12" from the plant. I measured, like 4 times, and put references lines on the hangers if they got bumped. Belive me, we are VERY detail oriented around here. Too much money on the line not to be. I just opened this month's power bill... $9,425. :(
Click to expand...
Yeah, the ignore button rocks!

A common error is to hang lights with no lenses or reflectors too far from the canopy, so nothing personal, we're just doing our own due diligence, rooting out and eliminating the stuff we commonly see.

I made the design choice to include 80 degree lenses, as much for long term durability and resistance to being sprayed as for light distribution. Also because my lights are 24" from the canopy.

That's a power bill, all right. Motherfuckers are no joke! So do you want a smaller bill or just more yield to show for it?
 
chuck estevez

chuck estevez

Well-Known Member
sixstring2112 said:
your first post,"now cry away"
you came in here lookin for a fight and pointed us to one of the worst side by sides i ever seen.the dude has a plant in the corner with almost no side lighting and 600w of cobs poorly set up vs a bunch of plants with 4x 1000w hid hanging around them .LAME!!!
here ya go charlie same cut same veg times same chop day 72 days both plants.my cross so i know how to grow this one a lil
de plant
Click to expand...
 
You must log in or register to reply here.
Top