BS ISO80000-7:2008 ICS 01060 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW BRITISH STANDARD Quantities and units Part 7: Light This British Standardwas published under theauthority of the StandardsPolicy and StrategyCommittee on 31 J anuary200© BSI 2008 ISBN 978 0 580 54867 3 Amendments/corrigenda issued since publication DateComments BS ISO 80000-7:2008 National foreword This British Standard is the UK implementation of ISO 80000-7:2008 Itsupersedes BS ISO 31-6:1992 which is withdrawnThe UK participation in its preparation was entrusted to TechnicalCommittee SS/7, General metrology, quantities, units and symbols A list of organizations represented on this committee can be obtained onrequest to its secretaryThis publication does not purport to include all the necessary provisionsof a contract Users are responsible for its correct application Compliance with a British Standard cannot confer immunityfrom legal obligations 9 BS ISO 80000-7:2008 INTERNATIONALSTANDARD ISO80000-7 First edition2008-11-15Reference numberISO80000-7:2008(E) © ISO2008 Quantities and units — Part7: Light Grandeurs et unités — Partie 7: Lumière