can anyone give me some advice about using my hps 400w lights above seeds which have germinated!Can i use this type of light to grow my seeds from scratch or must i use metal halide bulbs! any help would be appriciated cheers...!
yes it is absolutely fine, if not totally ideal, just make sure you have the light at least 2 feet above them. If they stretch lower the light immediately until you find they grow bushy rather than leggy.
ok the seeds have been germinating in darkness for 3 days now i notice shoots coming out. How much light do they get now? Do you go straight on to 12 and 12?