Painting my walls

I am painting my walls a satin white (matt) does anyone know what I am supposed to look for? There are so many different labels.

Just plain flat white is your best bet.

Flat white any brand, I like the mold and mildew proctection stuff for my room, think its made for bathrooms.

Flat White

Here is something most people miss when buying paint for homes, being a contractor as my last job I have the experience you seek. Don't get indoor flat white, get outdoor flat white, lowes brand is a great quality for cheaper price than some name brand paint. The outdoor reflects more light than indoor to help keep heat from making the paint peel or dim. Witch is what your looking for in something reflective for the plants

kilz and plan on doing it once a year

Flat white with the mold additive and also tell them to tint with titanium oxide, that is what makes the paint reflective.