...Mine are running in a 15-17 deg C room temp...
And you still have a positive ROI? 
We keep our building @ 24-26C.
I do not pay for electricity!
Lucker...
In some areas in UAE and Kuwait, permanent residents, born in country are eligible for free electricity for a lifetime.
This is what happens if you have 50 MegaWatt solar farms everywhere, but not enough citizens to put it in use
Import tariffs are an issue though...