good call, To be honest I have no idea what bulbs are in the lights that aren't hanging in my shop.. My father used to use them to start vegetable seedlings and winter over some orange and lemon trees and they seemed to work well enough, so he may have bought new bulbs at the local hydro shop he used to haunt

Do you think tomatoes would be a good test crop? or should I try something else?

Thanks again for your help, The 1k is definitely a grow light though
Douglas1 Reviewed by Douglas1 on . 400wat mh Hey guys, just wondering how many plants you can grow with a 400watt metal halide.. These are what my medical grow will be under, I have 5 of them with ballasts, and a 1k.. but its a mh too.. will these work alright for the flowering cycle? should I throw in a red or blue led to pump up the flowering period or will the big Hid do alright? Also, whats the yield like for a low stress trained plant grown under a 400watt mh? I know it depends on the plant and what not but a rough estimate Rating: 5