HELP! Questions about Led lights

[marte070]

Hi guys,

I tried to find that information everywhere with no success.
I try to understand the relation between the power of a led light (watt) and the size of the space where I grow.

I have a grow tent 27"x27"x65" and I have a 600w led light. If the temperature stays low (air conditioner) and the humidity is stable, how can I damage my plants in comparison with a 450w led light?

I'll try to explain. I have problems with my plants in flowering stage. At 28", the leaves still have sign of burning. Its an Viparspectra 600w Led lights with two switches ON (VEG, BLOOM). I asked questions to the seller and he told me that with the space of my grow, its better with a 450w.
If every leds on the panel are at the same power (5watt per led I think), how it could be different with a 450w led and a 600w led in my space grow?

I have 2 Northern lights from Nirvana shop. They're in soil. The temp is always around 77F. The humidity is around 45%. I use Dyna-Gro for nutrients. (2 bottles, 1 for veg, the other for bloom)

Thank you for your help.

[Weed Pharma]

Yeah, Viparspectra LED's rock and their customer service is really- just a sales force- I don't use them personally, but have experience with the new ViparspectraPAR 1200w in a wide open space.
What I find is the distances to the plant are too close- at least initially.
SO:
Move the LED away another 6" (at least) and see the results.
It's the temperature at the canopy (leaves) that matters not the ambient temps- you are fine below 80 degrees.
LED's require a lot less nutrients, but more Cal/Mag.

There is no difference between using the 450w (less yield) and the 600w cooled (more yield).