Do these come with bulbs?

No bulbs are included. You'll use the existing bulbs from your original housings or source them separately if needed.

What hardware is needed for installation?

Installation hardware is not confirmed in the specs — test-fit first, then secure using OEM fasteners or appropriate clips for your truck's mounting tabs.

Can I paint these or do they need prep work?

These are clear lenses designed for stock appearance, so painting isn't necessary. If you want to customize them, light sanding and clear coat will prepare the surface for paint or tint.