Hi buddy, 60cm distance seems a bit much with such a light.. maybe come a bit closer?
Your VPD is off also, if you cannot raise the humidity or lower the temps, the stomata of the leaves won't work so well. But it will not kill the plant.
With the toxidity.. check yourself.. does the water go thru the plant, or does it evaporate in the air more? If the plant drinks slowly, there might be a lot of nutrients left in the soil?
Happy growing!!