tyroncurtis42
New Member
Ok, so I have been using a 400 watt MH for veg, I now want to switch to a 600 watt HPS for flower. At what point do I change the bulb? Do I change before the lights are due to go out or do I change while it's dark in the tent? The only reason I am asking this is because it's pretty dark in the room where my tent is and I can't see a thing. Now if I turn on a light when the plants are in darkness it's going to interrupt the light cycle right? So how do I do it? I'm so confused.