Even the dual spectrum bulbs are no good for veg. OP you need MH pal.
Just to also add that if you use a dimmable ballast and dim down a 600w/400w bulb to 250w etc it wipes out the spectrum.
That's funny right there.
What's funny right where? Look at this pic the hps is dual spectrum it don't have nowhere near enough blue which is the issue normal HPS bulbs have.
Maybe tell that to the millions who run HPS throughout the grow. Telling someone they NEED MH is ridiculous.
Are you for real? This is pretty standard basic knowledge and has been for years and years. Yh can do a full grow with either light it doesn't make it ideal. What is ideal is MH for veg and HPS for flower. And don't dim any bulbs if you want to keep the spectrum change to correct bulb for the wattage set.
Good to hear mate, good luck with your grow
