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hps light

  1. A

    MH to HPS changeover concerns...

    Autos, week 4-5 from seed, preflowers barely showing. Time to go HPS? Do HPS lamps run hotter than MH - If so how much higher should I raise them (MH now @ ~22') Any other thoughts/comments? :Namaste: edited and corrected
  2. V

    Ultra Sun MH 75k & 10k kelvin temps

    Has anyone used these bulbs for veg and/or flowering? It says there good for all stages of growth but those temps seem high from veg usually being around 4200 and flowering being at around 2100 kelvin temps..
  3. K

    Grow Light Options Discussion

    The other day I was having a conversation with another grower I know about, what else, growing! In particular we were discussing grow lights and we had a bit of a disagreement over what was the best in terms of actual performance, overall cost, cost compared to performance, and so on...