Do these bolt straight to my roof or do I need to drill?

Mounting method not specified in product data — test-fit before committing to fasteners or adhesive. Roof panel material varies, so confirm your attachment approach won't compromise the seal.

Can I replace the H3 bulb myself if it fails?

Yes. The H3 bulb design allows for straightforward replacement without special tools. Keep a spare on hand if you run these regularly in heavy weather.

Do I need to prep or paint these before installation?

The blue tint is factory-applied to the lens. If you want to paint the housing, light-sand and use standard automotive primer and paint — test on a non-visible area first to confirm adhesion to the hard panel material.