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Lighting
Adequate lighting and utility outlets in a computer room reduce the
possibility of accidents during equipment servicing. Safer servicing is
also more efficient and, therefore, less costly.
For example, it is difficult to see cable connection points on the hardware
if there is not enough light. Adequate lighting reduces the chances of
connector damage when cables are installed or removed.
The minimum recommended illumination level is 70 foot-candles (756
lumens per square meter) when the light level is measured at 30 inches
(76.2 cm) above the floor.
Windows
Avoid housing computers in a room with windows. Sunlight entering a
computer room may cause problems. Magnetic tape storage media is
damaged if exposed to direct sunlight. Also, the heat generated by
sunlight places an additional load on the cooling system.