11 Fixed lighting apparatus, namely, elevated electric light fixture, electric inset and in-pavement light fixture, runway edge lighting fixture, threshold lighting fixture, taxiway edge lighting fixture, precision approach path indicator (PAPI) lighting fixture, approach lighting fixture, electric runway end identifier light (REIL) fixture, lead in lighting fixture, runway centerline lighting fixture, touch down zone lighting fixture, taxiway centerline lighting fixture, runway guard lighting fixture, stop bar lighting fixture, lead on and off lighting fixture, lighting fixtures for use in airfield guidance signs; obstruction lighting fixture and lighting installations for fixed aeronautical ground lighting; parts, optical components and fittings for fixed lighting apparatus and installations for fixed aeronautical ground lighting, namely, airfield LED light bulbs, airfield light bulbs, color filters for lighting apparatus, high light intensity LED light bulbs, mechanical LED-bulb installation parts in the nature of fixtures for light bulbs, heat dissipation parts being heat pipes to cool heat producing components, heat sinks for use in cooling apparatus, cooling evaporators, cooling domes, and LED light assemblies for commercial lighting and light bulbs