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Hi Hippieboy, MH lamp give a blueish in color (because they emit light that is mostly in the blue spectrum, this makes MH lights better suitable for the vegetative growing period, if u have MH lamp sure u can use it for vega.High pressure sodium lamp(Hps)colored yellow and red, since they are in the orange and red spectrum, Hps better for the floWering period. If u have only Hps u can use it in all stage groWing. Good luck.
Hippieboy
