"Lighting contractor" describes electrical contractors who specialize in the design, installation, and retrofit of lighting systems, a category distinct from general repair work, though many electricians handle both.
For a single fixture swap, most licensed electricians handle the job without issue. For a full lighting redesign, such as a kitchen renovation with layered task and ambient lighting, or a commercial retrofit across multiple rooms, our lighting contractor team's design experience typically produces a better result and can advise on fixture placement, not just wiring.
Further reading: Landscape lighting (Wikipedia)