Question about old style 300w led's

[mad212]

So I just picked up 2 of the old 300w led's. They will be in a 4x4 tent over 3 plants. What kinda distance do I need to keep these from the plants?

 

[namvet25]

I start mine at around 28 inches for early flowering than move down to 18 to twenty inches when there in full flower mode.You will have to experiment a little to find out what works best.

 

[G.Leave]

Hey...check out the grow journals in the microgrow section. You will see some guys with limited vertical space go much, much closer than recommended distances with the old 300w's.(some getting as close as 4" with no ill effects)

 

[Marshydro]

Hi Mad 212, usually you can start the hang the light higher around 24~30'' above the plants during veg, and when your plants adapt to the lights, you can hang them around 18~24''. During flower, hang the light around 12~18''.
Some growers prefer to hang the lights closer, but some will have problem, so please also adjust the distance based on how your plants' feedbacks.
By the way, please notice you need PH around 6~6.7, less water, nutrients, but more cal and mag, and RH above 50% during veg and 45~50% during flower. Hope this helps