This is correct, MH is a much better veg light, so if you can get both an MH(Veg) and an HPS(Flower). If you have to choose between one or the other because of financial or whatever reasons, I would go HPS.If you can run a MH bulb in the 250w ballast you should invest in one. you will see a huge diference in node spacing with it vs the hps.
Is your HPS dual spectrum? For veg you need 6400k (blue spectrum) and only the dual spectrum have added blue.Hey guys! right I'm currently growing 2 plants under 33w CFL
They are about 10 days old now in a plastic cup sized pot, firstly when should I transplant? And should I swap lights over to a 250w HPS when transplanted to bigger pot??
Yeah, some wait until they see first signs of bud but I think changing when you go to 12/12 is best route.Thanks for the advice guys! Gunna see if I can run a MH Bulb through my ballast! If not then will invest in a separate MH ballast! Also guys when should I change to HPS??? as soon as I go 12/12??
Interesting...I've never seen these before...neatHPS is great and all, but perhaps for a small gorw like yours, you should consider induction lighting? This is the lowest wattage I could find: http://www.hydroponicshut.com/50-watt-plasma-induction-grow-lamp-hydroponics-hut.html (you would need at least two to replace the HPS) The advantages are dual spectrum (more light gets absorbed by the plant), much longer lifespan than with HIDs, runs cooler, does not need a ballast and can be screwed into a regular E27 socket... you can bring this light closer to your plants than HPS, which is handy if you are growing in a small space. It would also make a great supplemental light.