MH (Metal Halide) bulbs are perfect for the vegetative stage and HPS (High-Pressure Sodium) bulbs are perfect for the flowering stage. Either one can be used for the whole grow, though most growers who choose j
Yes. HPS lights can be used for the entire cannabis grow from seed to harvest, though many growers like to start with a Metal Halide bulb in the same fixture before the cannabis hits the flowering stage because the MH bulb encourages cannabis plants to stay shorter....