Do I need OEM bumper lights for this to work?

Yes. This bumper is designed around factory light mounting points, so you'll need the OEM bumper lights to complete the installation. The panel does not include lights.

Can I paint this before or after installation?

Either method works. Many builders paint before install for cleaner coverage and easier masking. Post-install painting is also common if you're matching existing body work on-car.

Will this fit my lower valance or air dam?

Lower valance compatibility depends on your specific setup. The bumper's mounting points are factory-spec, but any custom or aftermarket lower panels should be test-fit before final assembly to ensure clearance.