32 days

these plants are 32 days from seed. had them under two 150 watt mh and tow 42 in. actinic tubes (blue). they are approximately 10-11 in. tall. when can they be put on 12/12 for flowering? can hps lights e added to the setup or do the plants have to be under hps only?

you can flower them whenever you feel like it, and you can use your mh lights along with an hps its just kind of a waste of electricity. look into getting mh conversion bulbs they are made for mh ballasts but have way more red light in them. it's made to simulate hps light. i've never used one but im pretty sure if you change to these bulbs you wont need an hps jus flower with that setup and change your fluorescents to around 3000k color spectrum (kitchen & bath)