Metal Halide or Hps or both

Ok I thought I was on the rite path and decided to go with a 400w HPS. Then I did some more reading and heard its better to start your young ones with a Metal Halide light during veg and then switch to the HPS for the flowering.

Then I read this post and it only threw me off more pH Water - See More Buds. From what I got from it, HPS is the way to go all the way?

So my question is, would it better to go with Metal Halide light for veg and then a HPS for flowering, or should I just use the HPS light for the whole grow.

Please let me hear your opinions, I would be much greatfull.

If you already got the HPS, just pick up some cool white flourescents for the first bit of the plant's life... the blue light is good for veg... get them really close... As they grow you can decide if you want to get a MH, or you could ADD the HPS for a fuller spectrum... but the HPS is a MUST for great results flowering.

My bad I posted the wrong link, anyways I have'nt purchased the HPS yet but I seen a light setup that can use both MH and HPS, Its was more money but seemed worth it if the MH light would come in handy.

Most people think thats probably optimal.

Thank you for the replies.

if you can get a switchable ballast you just cant lose, use both is cost isnt a factor

Or get a digital ballast and use either without having to switch anything but the bulbs.

Dual Spectrum - use MH and HPS together in all stages if possible.
The plants have never been happier

Yeah, I'm rockin 350w of MH and 8 100w CFL's into the 5th week of veggin, and I just LST'd and FIMmed em and they couldn't be happier. I wish I could get away with just using the MH for flower but it seems like that isn't the generally accepted thing to do...

You can both grow and flower using HPS. You should not use MH for flowering. Wrong light spectrum. So use HPS for the wholw grow and yr. plants will be happy. If you want to spend more money then get a mixed HPS/MH rig from Sunlight supplies. Its that simple.