What's the temperature of the amber light?

hi, the amber color temperature is 6200-7200K

Do you guys deliver it to Australia??

Hello, yes, we ship it to Australia for free.

Can this be hard wired to a switch that is already on the truck?

Hi, Thanks for your inquiry. Whether the switch device on your vehicle has a strobo function, we still recommend using our remote control to avoid losing the strobe function. If you don't want a wireless remote control, you can choose a pre-wired remote control.