The answer to 'how long does lighting installation last' is that with proper installation and maintenance, most indoor and outdoor lighting fixtures can last 10-20 years or more. The lifespan of a lighting fixture depends on factors like the quality of the materials, the type of bulb used, and how often the fixture is turned on and off.
High-quality, energy-efficient LED bulbs and fixtures tend to have the longest lifespans, often lasting 25,000 hours or more. Incandescent and halogen bulbs typically last 1,000-2,000 hours. Proper installation by a licensed electrician and following the manufacturer's recommended maintenance can help maximize the life of your lighting.