looks good. I go with the 36v cxb's more flexible for more drivers. peace
Hi, AvidLerner. I came to a similar conclusion regarding flexibility, unless COB's can be wired Parallel or in series with different COB's on the same driver/s. The scattered data on drivers, codes, number of outputs or COB's in parallel is doing my head in. I am trying to avoid COB's in Parallel unless there is a good reason beyond a few dollars. It is one of those things were you absorb the dictionary to find a few words, and why I joined the forum.
Thanks for checking the info.
If you're mounting your drivers remotely and using 3590, go with the 72V version so the wiring can be longer and losses smaller on the DC end.
This is a very good point, make for far better design.
As for the 1825, I'd push it somewhere around 100W. Keep in mind that is a 364W beast we're talking about. This way you'll gain more penetration and lower build costs without loosing noticeable efficacy.
I understand your reasons for running 1825 at 100W, this would give you more penetration at lower build cost.
Looking at the question in general, many people start with recommended intensity across Tray, then density/intensity number of COB's.
Which is a very good way to design a COB system.
My requirements and plan is a little different.
I have around 320 watts of energy available, initial outlay is not a concern with the current options!
Given the need of penetration, there are currently two standout COB's for "intensity across the Tray".
I am interested in the intensity/density combination of COB's within around 320W systems, and decided to use 5x 1825. Please do not take this to mean everything is set in stone, I would like to tease this out further.
Increasing the 1825 to 100W each would require 500W in total or the use of only 3x 1825 COB for a 300W system.
My 400W HPS parabola has about twice the penetration available from COB.
I say this, because the flower size, weight and density are very similar to the same plant outdoors. (Shocked Me!).
I do not say this is accurate, but lets say we have a single COB with half the penetration of my HPS.
Measuring from the center, the HPS is 2ocm from the top of plant, with another 50cm of penetration.
To reach across the Tray the HPS is 50cm from top of plant, with around 28cm of penetration at side of tray.
So we simple put COB's off center, the trade between the number of COB's per area and their individual penetration is critical to good design.
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What I have found extremely interesting, is my HPS parabola bleaches leaves without significant heat.
This suggests bleaching is caused by a combination of conditions that could include light spectrum, plenty of fresh air and avoiding hot spots helps.
When you hear of COB's needing 30 or 40 cm to avoid bleaching, even if the penetration is better for a single COB, it has to be a consideration based on the Tray size as with HPS.
Thank you for your discussion, I would like more people to weigh in.
Horto
