I think you may have that a little backwards. HPS is good for flowering, MH is supposed to be not so good. It's only because most HPS have a higher concentration of red light (flowering) while MH is more blue (veg). My personal candidate for best all around bulb is Ron Paul, i mean, EYE Hortilux SUPER BLUE - the hortilux super blue
I've read around that HPS can be used for the entire process. What difference would come of using MH during the veg stage, rather than just using HPS the entire way through?
during veg the plants like more blue spectrum. more red during flowering. the MH bulbs put out light in the blue spectrum, HPS bulbs are more red. they make an enhanced HPS that has "added" blue so you can veg and flower with the same bulb and ballast.![]()
LED's are they best. but depends on the color scheme you use.. if you get the right mix of red and blue, it could easily be better for flowering.