The answer to 'lighting installation replacement schedule' is that the typical lifespan of most light bulbs and fixtures is 1-5 years, depending on the type and usage. LED bulbs tend to last the longest at 25,000-50,000 hours, while incandescent bulbs may only last 1,000-2,000 hours. It's a good idea to inspect your lighting regularly and replace any bulbs or fixtures that are no longer functioning properly.
When replacing lighting, it's important to match the new fixture or bulb to the existing electrical wiring and socket type. If you're not comfortable doing this yourself, it's best to hire a licensed electrician to ensure the work is done safely and up to code.