The document discusses lighting in hotel guest rooms and public areas. It begins by defining light and its importance in hotels, noting that lighting plays both functional and aesthetic roles and enhances the guest experience. It then describes various classifications of lighting by source, direction, and function. Specific lighting requirements and considerations for guest rooms, corridors, reception areas, bars, function rooms, and restaurants are provided. The document emphasizes that a good lighting system fully utilizes daylight, is energy efficient, has good design and durability, and allows for easy maintenance and replacement of fixtures.