You use the MH along with the HPS in flowering stage. It helps create light that is more similar to the sun.
peterthegreek7 Reviewed by peterthegreek7 on . first big grow by twitch i have had 3 other grows on this site where i had 1 to 4 females, now i am doing a grow where i a hoping for at least 8 if not more. i started with 50 seeds of different genetics from people i have gotten over the past 4 years. i now have 26 seedlings they are under a 4 ft 4 bulb t5 lights, they are in fox farm potting soil and in the next couple of weeks they will start on a half dose of fox farm nutes i also have a 400 watt switchable ballast with an hps and i am getting a mh Rating: 5