Yes. *BUT* not for long!! I have done 3-4 solid runs using the MH at first I liked being able to see "colors" better in the GR. I have noticed a noticeable decline in Harvest Weight..(last run was epic difference)..So, turning to all HPS and gripping some Method -Sevens...should solve both Weight on the right side of the growroom and color.
I personally don't think MH have a place in the Growing of cannabis...(at any time)... I veg my plants under HPS and my seedlings and clones get fluorescent. I noticed that under HPS plants kept a bushy profile better and with much less stretching.