Well I have seen this debate on several forums as why even bother using a MH light at all. I think alot depends on your pocket book an HPS light well do just fine for veg but MH is optimum. Just like you can do w/o a Co2 setup but its optimum. So if you haven't the money to buy both kinds of light setups you don't really have to and still get decent weed.

SaH
SaH Reviewed by SaH on . Does anyone here veg with 2700k light.... I read on another thread but it was a while ago that someone vegged his seedlings with a 400w HPS 18/6 then switched to 12/12 when ready to flower, my question is why bother with MH/6500k light at all if the above method is true ? Cheers all. Rating: 5