think the idea is to have both red and blue spectrums available at the same time,dont think switching will accomplish that so id stick with the mh for veg and hps for flower!good luck.Any Difference is bud Quality, if you rotate every 1-2 Days MH (400watt) with HPS (400watt) lighting during vegetation before using only the Hps during flowering?
Or keep with the MH for vegitation and switch over to the HPS for flowering?
Thank you!