International ISO Standard ISO 22578-2 Graphical symbols - Safety colours First edition and safety signs - 2024-02 Part 2: Measurement of photopic luminance of phosphorescent components used in a natural disaster safety way guidance system Referencenumber ISO 22578-2:2024(en) @ ISO 2024 IS0 22578-2:2024(en) COPYRIGHT PROTECTED DOCUMENT CIS02024 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 orIso's memberbody inthe countryofthe requester. ISO copyright office CP 40i:Ch.de Blandonnet 8 CH-1214 Vernier, Geneva Phone: +41 22 749 01 11 Email:[email protected] Website: www.iso.org Published in Switzerland @ IS0 2024 - All rights reserved i