I use an autopilot environmental controller, it allows you to adjust the dead bands to your liking. An example would be 7 degrees Fahrenheit, thats a commonly used dead band but some like to run it tighter to optimize conditions, especially when running by VPD where you are playing with fire in the form of water vapor. You just have to figure out what works best for your room and equipment. I use the acurite wireless temp and humidity monitors and get nice charts that let you view your swings in action. Very handy.
If you are running a minisplit then you are left with it's own thermostat. A smart mini will only run as hard as it has to, thus it doesn't cycle on and off, it just runs at say 70% if thats all thats required. So you have to figure out what to set it at in order to maintain the room where you like. They make wifi controllers like Pebble that will let you schedule your AC to run when your lights are on, or day nite temps...
Air circulation is critical, you want to even out the climate in the room so as to prevent micro climates and false readings.
Another thing that makes things difficult is how devices use the dead band setting. For example, a 7 degree setting on one device would allow both + and - 3.5 degrees. Another device may say that for cooling, a 3 degree dead band means if it hits the set point temperature it pulls the room down 3 degrees before shutting off.
