ITF

60 FACILITIES GUIDE | JUNE 2020 It is important to choose the lamp wattage in relation to the mounting height in order to not create excessive glare for players and spectators. MAINTENANCE AND COST OF OWNERSHIP A new lighting system represents a considerable investment. Once this investment has been made the system should be maintained to ensure its performance over many years. As well as the installation costs (equipment and labour), a lighting system will have ongoing variable costs that it will attract over a number of years. This reviewed as part of the design, elements of such an analysis include: • Initial system cost excluding lamps. • Cost of lamps. • Estimated operational hours per year. • Load of system in kW (including gear losses). • Electricity cost per kW/ hour. • Number of lamp replacements over the assessment period. The light emitted by lamps depreciates over time as the components wear. However it is very important to note that efficiency is also reduced by dirt. Regular maintenance of lamps and fittings includes cleaning and is necessary to ensure that the installation continues to meet the original design specifications as efficiently and economically as possible. Maintenance comprises cleaning, safety testing, the regular replacement of lamps and other components with a limited service life, as well as the timely replacement of worn or damaged parts. Maintenance contributes to efficient energy consumption and prevents unnecessary costs. It should be carried out at least once a year or at the latest when the average illuminance has fallen to the average specified minimum illuminance.

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