Can each strip be a different color at the same time? For example: can each of the 48" be a different color while each of the 36" are a different color?

Thank you for your question. You can do that with two Bluetooth boxes.

Would these work as inter light

thanks for your inquiry, yes, it can be used as inter atmosphere lights

Can you buy 2 sets and double up the wiring to 1 box, so 1 app / 1 controller for both sets on same vechicle.

Hello, if you buy 2 sets, we will send you 2 Bluetooth remote controllers, but they will share the same Blluetooth APP.

How long are the leads that go to the lights? I want to use them on my boat.

Hello, it has 60 ft range and Bluetooth control.