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> Indoor lighting / General requirements / Maintenance Factor / Reference Maintenance Factors
In cases where fluorescent lamps are used and no secured estimates for determining the maintenance factor are available, the following reference maintenance factors or their reciprocal values (reference initial value factor) are recommended.
Table 3.30: Recommended reference maintenance factors
They result from calculations used to determine the maintenance factor based on reference values of lamps, luminaires and room by assuming standard installations often found in practice.
1According to EN 12193 "Light and lighting – Sports lighting", the maintenance factor is to be agreed upon between designer and owner or operator of the lighting installation before the start of planning. Where this is not the case, a (standardised) maintenance factor of 0,8 should be assumed. This is assuming that the lighting installations of many sports facilities have low annual durations of use.
Example for the determination of the maintenance factor due to reference values of fluorescent lamps, luminaires and the room Light and safety at work
Maintenance Factor due to reference values of light sources, luminaires and the surrounding room Lamp Maintenance Factor of an LED luminaire Luminaire Maintenance Factor Room Maintenance Factor Example for the determination of the maintenance factor due to technical data of LED luminaires and the specification of the room Lamp Maintenance Factor of a fluorescent lamp Example for the determination of the maintenance factor due to reference values of fluorescent lamps, luminaires and the room Reference Maintenance Factors
Introduction Visual needs Need for orientation Non visual needs
Guidelines Overview Work places Visual task area Surrounding area Illuminance Luminance distribution Limitation of glare Lighting direction, modelling Aspects of colour Flicker and stroboscopic effects Daylight
Maintenance Factor Light and safety at work Light and non-visual effects Light and economy Light and environment Lighting design Lighting measurement Emergency lighting
Lighting of traffic zones and geneal areas in buildings Lighting of industrial activities and crafts Lighting of offices and VDU workstations Lighting of design and CAD offices Lighting of sports facilities Lighting of health care facilities Lighting of geriatric care facilities and nursing homes Lighting of public areas Lighting of salesrooms Lighting of educational facilities Lighting of traffic areas Lighting of car parks Ligthing of further indoor spaces
Luminaires The enhanced concept of quality Photometric classification Photometric properties Photo biology safety Mounting and electrical connection Luminaire labelling Luminaire operation LED luminaire operation Operation of FL luminaires Electrical safety Fire protection Electromagnetic safety Mechanical safety Chemical and miscellaneous impact Acoustic properties Ventilation properties
Firehazardous locations Room with bathtubs and showers Swimming baths Exterior installations Agricultural and gardening plant locations Food industry Clean rooms Requirements on mediacal rooms Emergency light installations
Luminaire selection chart
Light management application and function Presence detection Daylight-dependent regulation Interfaces Building management, KNX and other bus systems
Light sources types Characteristics of light sources
ABC, DF, G, ILM, NO, P, QRSUV, W
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