No tooling needed, maybe a flat screwdriver to help pry the glass loose but that's it.
Sets like these come with a festoon and a T10 type connector.
The festoon connector has a spring so it fits all sizes.
Mine is pressed quite tight to fit in the Insight's 31 mm connector, but fits nicely nonetheless.
My LED grid is quite large and just fits in the light. It has a self adhesive backing which I kept covered, but the added thickness makes that the plastic glass barely holds.
I could remove the adhesive strip so it would not push the glass in the corners. A smaller grid would fit without a squeeze even with the adhesive strip.
This shows the grid lighting my interior.
There is a 20 Watt outdoor light about a meter away from the car (same as with the boot photo) so you have some indication of the relative strength of the light.
The fun bit is when you parked in an unlit area the dome light floods the area around the car. I avoided soiling my shoes at least once thanks to this