Nice work on your plant growing.
Can you put up a pic of your whole setup? Like the light, ventilation, etc ...
As someone has pointed out, White paint is one of the best things for light reflection & cleaning.
And yea, misting in cool conditions will definitely expose your plants to issues. The only advantage of misting certain plants is that you can clean the leaves & that you can't over fertilise your plants.
And, as some one else was eluding too ... make sure there is plenty of drainage in your soil & pots. Obviously much larger soil area leads to a more forgiving soil environment ie PH, fertiliser, water/drying out.
Make sure you don't use harmful chemicals & you flush plants with clean fresh water a little while before harvesting any produce.
Playing mother nature can be a lot harder than outdoor growing. Nice work.