The answer to 'lifespan of lighting installation' is that with proper maintenance, most indoor lighting fixtures can last 20-30 years or more. Outdoor lighting may have a shorter lifespan of 10-15 years due to exposure to the elements. The actual lifespan of your lighting installation will depend on factors like the quality of the fixtures, the bulb type, and how often the lights are used.
Proper maintenance is key to extending the lifespan of your lighting. This includes regularly cleaning fixtures, replacing burnt-out bulbs promptly, and ensuring proper ventilation to prevent overheating. Working with a licensed electrician for any electrical work can also help ensure your lighting lasts as long as possible.