I have a quesiton can grow 4 notherlights under a MH 400w ?
Can i flower and veg under that ?
got a good deal on one
dont buy it unless its hps/mh or you'll need a seperate one for flowering
(an MH will make really loose fluffy buds, probably worse then florecents)
If you get an hps it can work for veg/flowering,but using mh in veg and hps for flower will do best.
thats why you want a switchable ballast(usually just have to change the bulb, and whoalla done)
you can find one for like 120-140 buck off the internet easy(ebay,kajiji)
to be most efficient have a veg room (25% of your space)and a flower room(remaining 75%)
with florecents for mothers and clones and hps in the flower. if you do 2 seperate rooms sog it!(see of green)to get even more for your space.
you could do 4 its not asmuch howmany pplants as it is howmuch space.
a 400 will be great 4x4.if you keep 4 smaller plants directly under it and 4 half as old on the outside you can harvest twice as often.(less hand cramps from trimming for toolong at once)