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electrical contractor services; electrical repairs, maintenance and installation of electrical wiring, outlets, light fixtures and electrical panels; installation of power generators; retrofit of existing electrical systems; comprehensive preventive maintenance service for electrical systems; disaster recovery services in the field of electrical services, namely, repair of electrical wiring damages caused by a disaster and installation of power generators for use as backup until the main power source is restored; consulting in the field of lighting analysis for buildings, namely, technical consultation in the field of installation of lighting apparatus, lighting instruments and lighting systems