Tapping leds into 12v radio(Amps)

Okay, so to explain what I need help with I’m first going to explain what I plan on doing. I’m attempting to install led lights into my truck, the led light controller box is rated at 12v 1.5amp, I’m trying to tap into the head unit to pull 12v which is closest to where I want the controller box to be stationed. However if I’m correct the radio runs at about 5amps minimum, but if I tap into it would the leds only draw what amps is necessary? Or would the amperage be forced thru whenever say turning the radio up?

 

The leds would be tapping into the 12v wire supplying the radio. So with that said it is safe to hook them to that wire? Correct. Even if say i turn the volume up and it draws more amps to the head unit would that cause the leds to be supplied with more current? Thank you!

 

I understand what you are saying, I’ve already tested the tap(I’m using a t tap connector) and the radio is a 12v accessory wire. My truck is also a 2004 so there’s no interface, just a plane harness. Not sure if that’s what you were thinking of. However thank you!

 

I’m fine with them being on whenever the ignition key is inserted, just need them to be off whenever I remove the key. Which is perfect, I already have all that sorted and have confirmed with a volt meter that it is how I want them to operate. The controller box is also able to be turned off via the app, so if needed they can still be turned off. I was just curious at to how exactly the amps situation would work. Thanks!