The quality of lighting in a computer room plays a critical role in both the productivity and well-being of operators, IT technicians, and maintenance staff. It also directly impacts the reliable operation of sensitive electronic equipment. Therefore, careful consideration must be given to the selection of lighting control methods, lamp types, layout, and related electrical systems during the design and construction of an electronic equipment room.
In China, the primary standard for computer room lighting is illumination level. Illuminance (E) refers to the amount of light falling on a surface, measured as the luminous flux per unit area, expressed in lux (Lx). The formula is E = φ/S, where φ is the luminous flux and S is the surface area. When designing lighting for equipment rooms, factors such as uniformity of illumination, stability, color rendering, glare, and shadows should not be overlooked. These elements significantly affect operator comfort and efficiency, especially in large central computer rooms where different functional areas may have varying lighting needs.
For example, the average illuminance on vertical working surfaces at 1.4 meters height can exceed 500 Lx. Standards such as GB50034-2004 provide detailed specifications, including the average illuminance levels for different zones: 300–500 Lx for the main server room, 100–200 Lx for basic work areas, and specific guidelines for auxiliary rooms based on operational conditions. These include low, medium, or high illumination values depending on whether the equipment operates intermittently or continuously.
In general lighting design, aesthetics, location importance, and equipment placement are key considerations. Lamps should be evenly distributed across the room, maintaining consistent spacing and direction. Lighting should avoid creating shadows that could hinder maintenance or reduce visibility. Additionally, the lighting system must meet standards for illumination, uniformity, and glare reduction. Factors like brightness distribution, color rendering, and spatial lighting play a crucial role in ensuring a comfortable and efficient working environment.
Lighting fixtures should be selected for their energy efficiency, with a minimum efficiency of 65% for glass or transparent plastic covers. Louvered luminaires should have an efficiency above 60%. High-quality, reflective grids are recommended to match ceiling designs. Fluorescent lamps with Philips tubes are often used due to their high brightness, no glare, and quick start-up. Multiple sets of 3×36W embedded grille lights (600×1200 mm) are commonly installed, with one set connected to a UPS for emergency power.
Emergency lighting is also essential. Two common approaches are using a UPS-powered lighting circuit or emergency fluorescent lamps with a 15-minute battery backup. Emergency lighting typically provides an average of 60 Lx, switching from the main power supply to the emergency system when needed. To ensure even lighting, the concept of illuminance uniformity is used—defined as the ratio of the minimum to average illuminance on a horizontal plane 0.75 m above the floor. For optimal performance, this ratio should be greater than 0.7, and if not met, lighting fixtures should be rearranged accordingly.
Overall, effective computer room lighting design requires a balance between functionality, safety, and comfort, ensuring that all personnel can work efficiently in a well-lit and visually pleasing environment.
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Shenzhen Jiesaiyuan Electricity Co., Ltd. , https://www.gootuenergy.com