TECHNICAL ISO/CIE TS SPECIFICATION 22012 First edition 2019-02 Light and lighting Maintenance factor determination Way of working Reference number ISO/CIE TS 22012:2019(E) cie @IS0/CIE2019 IS0/CIE TS 22012:2019(E) COPYRIGHTPROTECTEDDOCUMENT IS0/CIE2019 All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either Iso at the address below or Iso's memberbody inthe country ofthe requester. ISOcopyrightoffice CIE Central Bureau CP 401 · Ch. de Blandonnet 8 BabenbergerstraBe 9/9A CH-1214 Vernier, Geneva A-1010 Vienna, Austria Phone: +41 22 749 01 11 Phone: +43 1 714 3187 Fax: +41 22 749 09 47 Fax: +41 22 749 09 47 Email: [email protected] Email: [email protected] Website: www.iso.org Website:www.cie.co.at Published in Switzerland i @ IS0/CIE 2019 -All rights reserved IS0/CIE TS 22012:2019(E) Contents Page Foreword ..iv Introduction. .. 1 Scope. ..1 2 Normative references ..1 3 Terms and definitions 4 Symbols and units ..3 5 Influencing factors .4 5.1 Luminaire and/or light source characteristics. .4 5.2 Recoverable external factors.. ..4 5.3 Non-recoverable external factors .4 5.4 Maintenance period, cleaning, replacement and surface refurbishment interval .4 6 Maintenance factor determination .5 6.1 Basic description of the method .5 6.2 Luminous flux factor 5 6.2.1 Luminous flux factor determination - -General 6.2.2 Luminousfluxfactordetermination- Special case: Constant light output (CLO)6 6.3 Survival factor. .8 6.3.1 Survival factor description .8 6.3.2 Spot replacement regime 6.3.3 Group replacement regime ..8 6.3.4 Regime combinations .9 6.4 Luminaire maintenance factor .9 6.4.1 Luminaire maintenance factor description .9 6.4.2 Indoor luminaires .10 6.4.3 Outdoor luminaires 10 6.5 Surface maintenance factor .10 7 Use of the maintenance factor ..10 7.1 Lighting design using the maintenance factor 10 7.2 Documentation 11 7.2.1 Documentation of maintenance factor determination ..11 7.2.2 Documentation of maintenance schedules ..11 7.3 Lighting verification using the maintenance factor .11 Annex A (informative) Maintenance factor determination examples ..13 Annex B (informative) Luminous flux factor fLr tables (Typical examples) ...17 Annex C (informative) Luminaire maintenance factor fm determination examples ..19 Annex D (informative) Surface maintenance factor fsm examples ..24 Bibliography ..28 @ IS0/CIE 2019 - All rights reserved ii