Yup agree that you should kick the mirrors, they cause more issues than good - good old flat white ceiling paint is what I use, it reflects far more the the light you are looking for and doesnt create hot spots that you will always get with mirrors.
CFLs pretty well can’t cause light burn, they can be touching the plants and still be cool enough to be no problem - I used to grow with CFL waaaaay back in the day before LEDs. But definitely do yourself a favour and she’ll out $100 to pick up a 100W full spectrum board/driver that is dimmable on Amazon, pretty well any cheaper Chinese board will blow CFLs out of the water, and then the price and quality go up from there.