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Maintenance of lighting systems involves the regular inspection, cleaning, repair, and replacement of components such as bulbs, fixtures, ballasts, and controls to ensure that the system functions efficiently and effectively. This includes tasks such as checking for flickering or dimming lights, replacing burnt-out bulbs, adjusting lighting levels, and troubleshooting electrical issues to maintain a well-lit and safe environment. Regular maintenance helps to extend the lifespan of lighting systems and prevent costly repairs or replacements in the future.