LED Companies w/ LINKS

every single vendor i mentioned in that first paragraph are commercial fixtures ready to go out of the box

http://www.tastyled.com/
http://johnsongrowlights.com/
http://www.pacificlightconcepts.com/

how can a cxB 3070 be a generation behind a cxB 3590? explain...

because theyre entirely different series. 3590 is a 30 mm les
3070 is 23 mm. while B may be the current generation of each, top bin 3590s are almost 10% more efficient than the same color in a 3070

Being based on the same technology we should expect them to perform similarly. There was a discussion about this recently and it turns out that the price/performance is very similar between the two at top bins. For instance, a 3070 3500K BB at 1.4 amps is 72% of nominal, uses about 50 watts, costs about $30. A 3590 3500K CD at 1.75 amps is 73% of nominal, uses about 62 watts and costs about $42. In addition at those currents the efficiency is very similar as well, 51% and 50% respectively at sub 50C temps.

It's comparing apples to apples. Small apples to big apples.

yes they are great bargains

i think nominal is kind of arbitrary, i was comparing at a given wattage

It's illustrates the light -vs- cost over time. At a given wattage the 3590 will be more efficient, costing more initially and saving more over time, but a percentage of nominal is more of a baseline for the performance of the chip and factors directly into the cost, and something worth taking into consideration.

To correct myself, it's 3590 at 2.1 amps that is reaching 50%, running a higher percentage of nominal to get there. This might be because having a larger heat load at nominal the 3590 was rated slightly under the 3070.

i think the heat dissipation surface limits the 3070s when put watt-for-watt against the 3590s

they seem to perform above spec when run soft

Most companies dont list the proper specs so its hard to really say which is more efficient. Ppf, ppfd. what type of spectrum and spectrum graph, umole/j how far from canopy 12" 16" and DLI all tie into my decision making. So ima go with the company that does the proper research and documents thier spec properly. Its good to see new companies paving the way so people become knowledgeable of leds and thier potential

Rahz said:

Being based on the same technology we should expect them to perform similarly. There was a discussion about this recently and it turns out that the price/performance is very similar between the two at top bins. For instance, a 3070 3500K BB at 1.4 amps is 72% of nominal, uses about 50 watts, costs about $30. A 3590 3500K CD at 1.75 amps is 73% of nominal, uses about 62 watts and costs about $42. In addition at those currents the efficiency is very similar as well, 51% and 50% respectively at sub 50C temps.

It's comparing apples to apples. Small apples to big apples.

Click to expand...

Is 3500k enough for flower and veg? The leoled has "4x CREE CXB3070 (1x 2700K, 2x 3500K, 1x 5000K)" seems like a more board full spectrum

The can be slight differences in the spectral curves, but it's basically just going to average out to a particular curve. 1x 2700K, 2x 3500K, 1x 5000K = 3675K average. It may have a higher K in veg mode if there is one, which could give a slight efficiency boost but as far as the spectrum is concerned I don't see that being a game changer. It can cause shorter internodes during the vegetative stage, but whether that's a good thing is debatable. If someone is trying to get a plant grown into a 2x2 space, longer internodes isn't necessarily a bad thing and can potentially reduce the veg time.

Just came across this light .
http://smartgrowtechnologies.com/product/rzr-300-led-grow-light/
Looks to be using samsung leds and have a umole thats beyond crazyy please have a look

thats impressive but 5000K DB bins @ 700 mA are also over 3 ppf/W and are out now

DD bin imminent (realstyles already has some)

Rahz said:

It's comparing apples to apples. Small apples to big apples.

Click to expand...

It certainly isn't macintosh to braeburn!!! ROTF

Good info though, thought I was behind the times with cxa, but they're not the flip phone I was thinking.

BOBBY_G said:

every single vendor i mentioned in that first paragraph are commercial fixtures ready to go out of the box

http://www.tastyled.com/
http://johnsongrowlights.com/
http://www.pacificlightconcepts.com/

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^^^^"commercial" fixtures without UL/ETL certs???........................... I don't think so

you know what i meant.....'assembled', is that better?

BOBBY_G said:

you know what i meant.....'assembled', is that better?

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assembled,pre-built.............YES , much better!

I have used a 3w led panel for 3 years. It has served me well. I really want move into a cob setup with 3590 or vero.
I have the ability to source and build it. I would prefer to have a kit with all parts included maybe without a frame. A one stop shopping deal either from a company or an individual would be cool too.
I think it would be a quick fun project and save a few bucks. I would expect to pay for the time and trouble. Any ideas or suggestions?

BOBBY_G said:

it uses 3070s which are a generation behind the current 3590s used in commercial builds by forum members like tasty, johnson, plc, etc
other than that, nothing at all magical about it. any build using 3070s/3590s/vero 29s at the same current/wattage will perform similarly

Click to expand...

PLC doesn't use 3590's nor does Johnson I don't think.

Airwalker16 said:

PLC doesn't use 3590's nor does Johnson I don't think.

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Johnson's air cooled light does, but it's sold out

There's no need to air cool cobs. I don't get it.