Will these mount directly to the factory fog light holes?

Yes. These are designed for factory mounting points, so no drilling or bracket modifications are needed. Test-fit before final securing to ensure alignment.

Does the switch need to be hidden or can it mount anywhere?

The switch mounts on the dash — placement is up to you. Most run the wiring behind the kick panel and under the dash. Refer to your vehicle's wiring diagram for safe routing and grounding points.

Can I upgrade to a brighter bulb later?

H11 is the specified bulb type for these lights. You can swap for a higher-output H11 (like 80W or 100W) if your electrical system supports it, but stick with H11 size to avoid fitment issues.