I started out with just veg switch on at 29 3/4 inches Away and moved it up a couple inches just as a precaution add they started too grow. Kinda just following mars recommendations on their site but worried about kicking this beat to full power so I'll use both of your guys recommendations. I will hang the light as high as my tent will allow on my pully system and slightly lower it each day. Hoping something starts to happen soon. Feel like my plants are small and nothing like my first grow. Guess I'm just have to get some more started so I can keep my quantity up there lol was hoping it would keep up with my HPS. Kinda discouraged to b honest. But let's see how things go at the end before I get too excited and toss my led for HPS again. So far I can't say I'm to impressed with how things are looking in my tent. Maybe a user error of the light or nutrients or setup or something else but I'm doing something wrong. Discouraging I'm no where's neat my first grow at this age for the plants