Wow I want your electric Bill I've been paying almost 900 a month, for 2400 Watts of light and a 12000 btu AC. Stupid California. They wonder why people steal power. after 3 months of non stop AC it quit working and killed my yeilds and quality I went 3 days with no AC. Now I got no money to get going again. I Will find a way but it's going to be tough to get through the next 3 monthsthere better things to use that will get you R-40 in a 3/1/2" wall space.
i used a combination of 2" eps foam panels- R-7.5
and inm mid stream found polyisocyaurnate foam panels at the roofing supply house, they come in thickness up to 4"
the 2 inch panels i used were rated R-12 or R-13.
Prodex was the icing on the cake,
this stuff is only 13/64ths of an inch thick and is R-16.
use it with air space and you'll get top results
its also a radiant barrier and also gives you a 19dba drop in contact noise reduction.
i uses a combo of all three. I would have skipped the eps foam because the iso was superior but i already install some of the eps.
the neat thing with the iso is R value increases as it gets thicker!
my 1st elec bill came in and I'm amazed...
6000w of light in veg 18hrs a day
6 mag ballasts in the room w/running temps 145-164F
gas Co2 gen
a bunch of fans pumps etc etc
it was under $90 for my mini split
total bill, under $500
i was expecting up to $700-$750
anyways something to mull over
and my