[Royal queen seeds(shining silverze has)] so, i have on 400 watts of Sodium (on a flowering) till 12/12 left little time (maximum 4-5 weeks) and i want to return for 1 week to metalohalogen on 400 watts (over vegetation) on 18/16 what it will do
Don’t understand your question exactly.
I understand your using HPS bulb now which is correct at 12/12 flowering. How long has it been in flower? If you’re to far into 12/12 you risk stressing your plant, if it’s only been a day or two it should be ok to continue veg cycle.
At this point you should not be going back to veg lighting hours it will shock the plant