Lighting Autos under 5000k Cob

[Uncle Bert]

Hi There people,
Anyone grown autos under a 54w 5000k cob from start to finish?
If so how did it turn out?

 

[Wico]

Take a look at this chart:



It should work with decent yield. I would expect the plants to grow bigger, but yield less per volume. The taste could be good because you have a lot of blue during end of flower. So as always use training and trimming to increase yield. You will however need 2 of those if you really want to grow one big plant.

 

[Uncle Bert]

Cheers Wico,
I've just received a 3500k cob to work in unison with my 5000k one. As you say that should bring on 1 plant nicely or possibly 2 plants pushed up together under both lights I'm hoping??

 

[Wico]

With 2 COBs on full power I would stick to one big plant and would try to get 200 gram (auto 24/0) from it...

 

[Uncle Bert]

I'd be happy with half that amount tbh

 

[Wico]

That would be less than 1 gpw (and terrible) I got 1.67 gpw from my first LED grow using LST and FIM. So get that 200 gram or die tryin'!

 

[Wico]

You bought Optic 1s?

 

[Death The Cultivator]

Hi There people,
Anyone grown autos under a 54w 5000k cob from start to finish?
If so how did it turn out?

Efficiency matters more than color. 5000k will produce tighter nodes while the 3500k adds more red, a more efficient color, that adds weight/density.

Are they autocobs?

 

[Uncle Bert]

They're Optic 1s 54w
They claim the 5000k is good for auto flowering so I went with that, it's only looking about on these sites that nearly everyone who grows with cobs uses 3500k. I have LST my royal gorrila glue auto, I stressed her a few times in the early stages so that's probably why she's a little stunter.. 6 wks old and only 12 inches, bushy as hell though, she pre flowered at 4 weeks but development budwise has been a bit slow.

 

[Uncle Bert]

Also can I just hang the 2 cobs next to each other or say leave them 3 to 6 inches apart and I have the 1 cob hanging above the canopy at 18 inches. With 2 cobs do I need to increase the height?