My suggestion if you already have an LED dome light and it's not sufficient, is to add accent LED lighting where you need it by connecting to the dome light circuit. That's what I did to my gold and red Cobalts. These come on anf off with the dome lighting.
Here is the circuit, pin A3, A10 of C3 of BCM. "A3" being the B+ supply and "A10" the control to ground. "A" row of pins is the bottom row on C3 connector.