EDITORIAL

SECRETARY Brendan Keely FSLL bkeely@cibse.org

SLL COORDINATOR Juliet Rennie Tel: 020 8772 3685 jrennie@cibse.org

EDITOR Jill Entwistle jillentwistle@yahoo.com

COMMUNICATIONS COMMITTEE: Linda Salamoun MSLL (chair) Iain Carlile FSLL Jill Entwistle Chris Fordham MSLL Rebecca Hodge Eliot Horsman MSLL Stewart Langdown FSLL Rory Marples MSLL Bruce Weil Gethyn Williams

All contributions are the responsibility of the author, and do not necessarily reflect the views of the society. All contributions are personal, except where attributed to an organisation represented by the author.

COPY DATE FOR LL2 2021 IS 8 JANUARY

PUBLISHED BY The Society of Light and Lighting 222 Balham High Road London SW12 9BS www.sll.org.uk ISSN 2632-2838

© 2021 THE SOCIETY OF LIGHT AND LIGHTING

The Society of Light and Lighting is part of the Chartered Institution of Building Services Engineers, 222 Balham High Road, London SW12 9BS. Charity registration no 278104

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FROM THE EDITOR

In all things human there is often a gap between knowing and doing. We are aware of a problem, we even know how to solve it, but it takes effort and will to implement that solution, especially difficult when the effort needs to be collective and diverse. The circular economy is a case in point. The term has been around for years, and expressions of the same principle even longer. Cradle to Cradle by William McDonough and Michael Braungart was published in 2002, and threads go back further to 1976 with architect and industrial analyst William Stahel. But while anyone sane would think it's a jolly good thing, it has only been implemented around the fringes.

It seems that some sort of critical mass in thinking and attitudes needs to be achieved before such ideas gain traction. Where lighting is concerned, Mark Ridler of BDP points to his own example (A new lease on light, p8). He noted an atmospheric change in 2019 when manufacturers began to turn serious attention to improving, and the CE in lighting became the subject of conferences, such as that organised by Recolight. He decided to make 2020 the year of the circular economy for his own design team. Serendipity gave them a workplace project that put CE at the heart of its brief so that the process could be fully researched and explored. Now central to the team's practice, it has become an example for others to follow. As Ridler says, 'When the stuff runs out, we’re going to have to do it anyway.'

JILL ENTWISTLE

JILLENTWISTLE @YAHOO.COM

CURRENT SLL LIGHTING GUIDES SLL Lighting Guide 0: Introduction to Light and Lighting (2017) SLL Lighting Guide 1: The Industrial Environment (2018) SLL Lighting Guide 2: Lighting for Healthcare Premises (2019) SLL Lighting Guide 4: Sports (2006) SLL Lighting Guide 5: Lighting for Education (2011) SLL Lighting Guide 6: The Exterior Environment (2016) SLL Lighting Guide 7: Office Lighting (2015) SLL Lighting Guide 8: Lighting for Museums and Galleries (2015) SLL Lighting Guide 9: Lighting for Communal Residential Buildings (2013) SLL Lighting Guide 10: Daylighting – a guide for designers (2014) SLL Lighting Guide 11: Surface Reflectance and Colour (2001) SLL Lighting Guide 12: Emergency Lighting Design Guide (2015) SLL Lighting Guide 13: Places of Worship (2018) SLL Lighting Guide 14: Control of Electric Lighting (2016) SLL Lighting Guide 15: Transport Buildings (2017) SLL Lighting Guide 16: Lighting for Stairs (2017) SLL Lighting Guide 17: Lighting for Retail Premises (2018) SLL Lighting Guide 18: Lighting for Licensed Premises (2018) SLL Lighting Guide 19: Lighting for Extreme Conditions (2019) SLL Lighting Guide 20: Lighting and Facilities Management (2020) Guide to Limiting Obtrusive Light (2012) Code for Lighting (2012) Commissioning Code L (2018) SLL Lighting Handbook (2018)