Maintenance of LEDs

Naturally, the individual partial maintenance factors can never be higher than 1.0, and consequently neither can the resulting overall maintenance factor. Generally the result should be around 0.8 for interior spaces and 0.6 for outdoors. The rule here is: The higher the figure, the lower the necessary maintenance effort, while the result has to always be interpreted in relation to the optimum, which would be 1.

A maintenance factor of 0.8 for example results in having to oversize the lighting system by 25 percent, so that the necessary light flux of the lighting system can be guaranteed within a given time frame. In the context of industrial buildings, further specific criteria have to be taken into account and factored in: for example, the Room Maintenance Factor (RMF) is usually smaller than that for conventional interiors, as dirt in production halls tends to be much more frequent than in normal office spaces. Therefore, cleaning

of lamps and encasements has to happen sooner. In the summer especially, industrial buildings ( and this applies in particular under the ceilings, where lamps are installed) can get very warm. In this case, the figures for higher temperatures, separately quoted by the manufacturer, have to be considered.

In addition to this, lamps in production halls are subject to extreme strain as they are often constantly in use. For intense and longterm use in the industrial sector, TRILUX provides specific luminaires that have a longer rated lamp lifetime of 90,000 or even 100,000 hours, for example Mirona or Nextrema, which in addition to this can also be used in wet rooms. Further information concerning the determination of a maintenance factor can be found in the “German Guidelines for Planning Security in LED Lighting” issued by ZVEI.