Will this bulb fit my factory fog light housing without any adapters?

Yes. H10 bulbs mount directly into the factory housing on supported vehicles — no adapter or modification needed. Slide it in and secure the retaining ring.

Can I upgrade to a different bulb type later, or am I locked into H10?

Your fog housing is designed for H10 fitment. If you want a different output or color temperature down the road, you'd swap in another H10 bulb — your housing stays the same.

How long does a halogen bulb like this typically last before it burns out?

Halogen bulbs generally run 500–1000 hours depending on driving habits and electrical condition. Avoid touching the bulb surface with bare hands when installing — oils can shorten lifespan.