What you might be thinking of, or seeing, is one of the following:
* Daytime Running Lights (DRLs): Many Dodge Magnums have DRLs. These are usually a reduced intensity version of the headlights (often just the low beams) that automatically turn on when the car is started and the headlights are not manually activated. They are intended to improve daytime visibility.
* Headlights on low beam: You might be seeing the headlights on low beam, even during the day, if someone has them manually switched on. This is perfectly legal and common in some situations (like low visibility conditions even during daylight hours, or for added safety).
* Aftermarket additions: It's *possible* someone has added aftermarket driving lights to the Magnum. These would be additional lights, separate from the factory-installed lighting.
To clarify, if you're looking for a way to activate additional lights specifically for daytime use *beyond* what's already there (DRLs or low beam headlights), you'd need to install them yourself. There's no hidden factory feature to do this.