Lighting New on this forum

Thanks Dabber,

Can you tell me what are the signs if they are too close? (will do a Google as well:)
Light stress
light-burned-leaves-sm.jpg
 
So not much different than with HPS regarding light stress symptoms.
Maybe I have to much going on 3 cobs for my wardrobe 35x90x170 cm (14x35x67 inch) 2 plants.
But can always switch one off, anyway will find out soon with this test run.

I read about adding Mag/Cal when using the Cobs is this strain specific or the general rule or
the combination of Cobs and autoflowers?

This will be my first cob/autoflower grow did many old fashion runs
 
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So not much different than with HPS regarding light stress symptoms.
Maybe I have to much going on 3 cobs for my wardrobe 35x90x170 cm (14x35x67 inch) 2 plants.
But can always switch one off, anyway will find out soon with this test run.

I read about adding Mag/Cal when using the Cobs is this strain specific or the general rule or
the combination of Cobs and autoflowers?

This will be my first cob/autoflower grow did many old fashion runs
Some of are believing that the COBs are so intense they cause the plants to use up cal/mag at a faster rate. I have four on during flower in my tent and I always have at least 200ppm of calmag in the reservoir. I don’t think it matters if it’s an auto or photo.
 
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