Grow light switch and duration


#1

Hi new medical grower here. My first question is after putting the seeds in the soil. How long or how many weeks should I keep the metal halide bulb on before I switch to the HPS bulb?

Thank you


#2

Metal Halide is commonly used during the vegetative photo period. You use this for the entire veg’ cycle. For full maturity toy veg’ for 8 weeks, then change to HPS. From clone; You can change anywhere from 3 weeks to 8 weeks, depending on grow space.

HPS lamp is used for flower cycle. 12/12, inducing the plant to present sex, and flower.


#3

Thank you… It is greatly appreciated.


#4

No worries. Peace