Grow Hack: Does Switching from Metal Halides to HPS for Flowering Work?
Indoor grow specialists all over the world use blue-heavy metal halide lamps (MH) for vegetative growth and switch to red-heavy high pressure sodium (HPS) lamps for flowering, but is this pricey, laborious process actually beneficial for cannabis?
Source: Grow Hack: Does Switching from Metal Halides to HPS for Flowering Work? (http://feedproxy.google.com/~r/HIGHTIMESMagazine/~3/eckyGpIha2Y/grow-hack-does-switching-metal-halides-hps-flowering-work)