The current Air humidity is 53%, and the night air temperature is 27 Degrees Centigrade, compost/substrate temperature is 15 degrees Centigrade,
The water volume per pot is 2 litres every 3 days, when using LED's watering is far less than 600W HPS, the plants only use what water they need, with LED's lamps you have very little evaporation, this is due to the LED's not giving off much heat, and the environment/room remains at the desired ideal temperature.
I continue to use Root stimulant at 5 ml per litre of water, and as you can see most plants are thriving and developing strong root development which is very important for healthy productive plants.