Luz en distintas en fases

genetics are king. yes, the CCT of the light may impact the plant in small ways. It will not turn a bushy plant into a lanky plant or vice versa. The factor will be so small that if it is simply more convenient to use the warmer CCT hps, then go ahead and do that. DLI is vast majority of what dictates yield. i've used 2900K - 3500K and i see virtually no difference with my eye with clones and seeds of same strain etc over 6 years. That doesn't mean there are not measureable differences ( i do believe the science of it), what it means is that those differences are small - proper perspective on them. often you need a much weaker light early on, so 2 lights is usually a good thing just for that reason. as they grow out and near flower, you pull out the big boy light. You often need 150% power going from 18h to 12 h cycle too, in order to provide same DLI as before.

Hey buddy! Yes, there is a significant difference between using high-pressure sodium (HPS) lamps for growing vegetables and using metal halide (MH) lamps for flora in general. HPS lamps, which emit a warmer light, are more effective for the flowering phase, promoting greater development of fruits and flowers. On the other hand, metal halide lamps, which emit a cooler and bluish light, are better for the vegetative phase, encouraging more vigorous growth of leaves and stems. This is due to the different light needs in each phase of plant development. Good vibes!

The difference in light colour makes NDl light suitable for flowering, because of the orange/red light. MH light is better for veg because they have more blue light causing shorter internodes. So using MH during veg causes shorter, more bushy plants, and NDl causes more stretched plants.