Need help with making my emergency vehicle lights light up the environment more

Hello, I was wondering if anyone would be able to help get the environmental light that comes off my emergency vehicle brighter. I’ve looked around a lot, but I haven’t found anywhere that told be how to do this.

Here’s an example of one of the cars that I would like brighter:

And I would like the lights to light up the environment like this:

  1. use the same carols line
  2. ensure the modeler hasnt chucked the lights below the car