100% HF GH was a cost decision. As its just in my back yard it didn't make a bunch of sense to spend big coin on the GH. I really dont want to but I will resort to tarping it if I have to. As far as I know light dep is necessary if you want to grow year round. no? This will be my first spring/summer cycle so I want to be prepared as possible. I am certainly going to try the non conventional route and see if I can engineer something that works for my puposes. Ill make sure and take pics if I get something figured out. If that doesnt work, I'll just throw a bag over it and call it a day!
I never ran without tarps. This is bring back some fun times. I did my first GH grow from like October thru to January and I had a mentor that I would pick his brain and he basically told me to do light dep from the start. It was a pain, I bought a tarp from HD thinking it would black out the GH but with lights running in the GH it light up the yard. I ended up with a 6 mil plastic tarp and a HD tarp, so it was 2 tarps every morning and evening.
Is this going to be your first run in the GH? I am asking because I am looking at your exhaust and it looked like it might not be enough once things start heating up. I was in a 7' x 15' x 7' hop house style with a 4" exhaust and 6" exhaust and that was not enough come summer time. So keep an eye on that. I also ran a dehumidifier in the GH as well.
Back to the light dep, I would just bite the bullet and figure on some tarps around the outside. I knew one GH grower that punched a reinforced hole in a couple of corners and would use sticks to manipulate the tarps into place. In my experience there was no easy way to get it done and your GH would be even more of a challenge. and removing the tarps and putting back up makes more noise than you think.
I remember on the 4th of July, I had forgot to cover the GH and about 3 o'clock in the morning I woke up like the sun was up. I forgot to cover the GH. I had to shut the lights off, wait a few minutes and cover the GH so I could turn the lights back on and the nieghbors would not get anymore noise than they probably were.