Cob fixture height

What's a common height for unlensed and lenses (x3),3070cx#,vero 29
I have the optic vero cxb200 at 6 inches, the plants grew up to. The vero 29 360 watt is 12 inches lensed. Too close?
Doors wide open...

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at beginning of flower 16inches end of flower 4 or 6 inches. lenses on the whole way!

I've witnessed bleaching with Vero 18's directly above canopy, which happened to be around 3-4 inches; they were driven at 30W and had no lenses or reflectors, with the plant well into the flowering stage.

At the time, I was merely seeking how close the canopy and COBS could be together without problems occurring.

I'd like to believe that with more powerful COBS (Vero 29, CXB 3070-3590), the greater the distance between the two surfaces but I have yet to experience Optic grow lights, like Jindica has.

Distance does help coverage area though?

The optic vero 360 I have seems to do a great job at heavy even light, the cxb with lenses is a bit touchier with coverage thanks for the input.

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whats your take 360 vs 200watt? coverage area? I bought the 2 smaller units instead of the 360!

cityworker415 said:

What's a common height for unlensed and lenses (x3),3070cx#,vero 29
I have the optic vero cxb200 at 6 inches, the plants grew up to. The vero 29 360 watt is 12 inches lensed. Too close?
Doors wide open...

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Click to expand...

Just watch your plants..............read the signs and adjust appropriately. Their isn't a general height that works for all .

be safe grower

JimmyIndica said:

whats your take 360 vs 200watt? coverage area? I bought the 2 smaller units instead of the 360!

Click to expand...

Not quite sure I understand that there's a lot more light hitting the plants then I can see reference based on the visual appearance of the tent. I definitely have to go with the Vero the bud seem very fat under it,

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I agree definitely watch the plants.

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cityworker415 said:

Not quite sure I understand that there's a lot more light hitting the plants then I can see reference based on the visual appearance of the tent. I definitely have to go with the Vero the bud seem very fat under it,

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Click to expand...

Does it cover the full 2ft x 3ft at 12inches?

Yes it covers the 3x2 at 12" but out side of that it's straight dark. For a 4x4 it's gonna be tough to go heavy regarding the optic line up, even the 500 water model has the cut off with the lenses on. I have a 3x3 tray in my 4x4 and can fill it wall to wall with just the 360 vero,but at 4x4@12" fixture height I need the cxb up about 16~°20 " for a 2x3 leaving either 1 or 2 dark corners. Cheers

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Ok I had the cxb out for cleaning and put the vero fixture up high,damn high like 20 inches, AT 20 IT COVERS THE 4X4. the lux readings I took still give me more light at 20 than my CLW tent with the solar storm and flares. Next run I might do just 4 plants instead of 5 or 6 and keep it up higher than I am in the name of efficiency. Not sure but the quality of light is much better, not just the quantity of photons but the Whole package of lumens,cri and watts. The cobs are clearly superior to small multiple chips

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There is no height that works for every light...but there is an intensity range. And is what matters. Unfortunately 99.999% of LED companies don't take that into consideration or even know about this basic horticulture fact. They just visually look with their lumen sensitive eyes and guess that it is "covering". Or they get it to hit a peak intensity with no idea of what the rest of the canopy is getting, not just that one spot.
I have no idea what height my lights are at. Haven't checked in years. But I can tell you umol readings from all over the canopy.

Barely anyone has a par meter. I know they are kinda pricey for the average grower...but they are a necessary tool IMO.

GG I feel you on the lack of metrics available from the manufacturer, I have used a few camera lux meters for averaging my canopy brightness probably useless but I can then get a ballpark of what I'm working with. There seems to be more of a cone of light then an even spread when it comes to my tent in my opinion more like less of them softer closer to the canopy is the way to go. Oh well fun arena to learn in.

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