12v illuminated flick switch to Arduino

Thanks for the feedback, you're right about the resistors, dropped a zero along the way. Putting a 1.5k resistor would drop the voltage to 4.8 volts, is that enough to read high on the Arduino pins?

Also, have I got the wires in the correct place, in between the resistors?

Also, this is going to be built into a wooden structure in my kids room, do I need to worry about heat dropping the voltage so much?

With regards to ground connections, I reworked the diagram with the correct wiring, does that make more sense?

Thanks