My 1000w MH blew put last night so I am forced to use my HPS about 3 weeks into veg.. Will my plants still veg if I keep the light at 18/6? I don't have the money for a new bulb right now so this is kinda the only way to go. Luckly in 3 weeks I was able to get quite a bit of lsting in
HPS works just fine in veg, i didn't even bother switching out my bulb back to the MH this run. You might find the MH isn't even worth buying after seeing how the HPS does. The one thing I would say that the MH has over the hps is you get tighter nodes, but i've seen a great deal of plants on here that were vegged under hps and turned into some excellent plants.