Deep plates feature a deeper edge bevel to reach back farther around your electrical box s edges.
Gap between light switch and wall.
Make sure they are firmly connected.
If the gap is bigger and lopsided use foam sealant that s formulated for use around doors and window framing.
When you add a switch or outlet cover there s a gap between the cover the wall.
This can happen when you remove wall paneling tile wainscot or batten.
The other is to cover the area with a contact paper and trim the outside to match the edge of the switch plate.
Plastic shims are a fast easy solution for backsplash electrical outlets in which the wall box is recessed below tiling quartz granite paneling etc.
In situations where drywall workmanship is sloppier creating a large gap between the electrical box and the drywall or in cases where removal of an old cover plate leaves an old paint line then use of the preferred or even the oversized cover plates work well.
Your area looka a bit rough so the contact paper might have a tough time laying flat.
Twist the ground wire coming from your light fixture to the ground wire coming from the wall using a clockwise motion.
Twist your wire cap on to secure the two wires.
Typically the standard size is used for new construction where construction tolerances are tighter.
Twist the white wire from the light fixture to the white wire coming from the wall using a clockwise motion.
If the gap between the electrical box and the drywall is less than 1 4 in fill it with acrylic latex caulk.
I think they invented them just for situations like this.
Look for some oversized cover plates.