Will this bolt straight into the factory holes?

Yes — this light mounts at the factory cab locations with no drilling. You'll be working with existing holes and fastener points on your truck.

Do I need to splice into existing wiring or run new power?

Test-fit first to confirm the connector type matches your truck's cabin wiring. If your Ram's original cab light connector is compatible, the swap is straightforward — if not, you may need an adapter harness sourced separately.

What's the lifespan of the LED versus the factory bulb?

LEDs outlast incandescent bulbs by thousands of hours and draw less current, so you're looking at minimal maintenance once installed. The solid-state design also handles vibration better on rough terrain.