I unfortunately have no experience to share about this, but all of the research I've done in the past about this are usually people trying to get the most out of the lights by using a lot of unoccupied space. So in theory, you should yield more per watt then the standard method. Hopefully someone comes along to share some experiences.
@chemphlegm will surely post a pic of a vert grow thats just awesome, experience needed! Never done vert, still trying to grow healthy "normal" plants, myself!
@chemphlegm will surely post a pic of a vert grow thats just awesome, experience needed! Never done vert, still trying to grow healthy "normal" plants, myself!