Circular Lighting Report

Cibse plans lighting version of TM65

TM65 for lighting

A special lighting version of Cibse’s Technical Memorandum 65 is being planned, it has been revealed.

The lighting edition of TM65 – a widely-accepted metric for measuring embodied carbon – is currently in draft stage and is undergoing peer review before it is released later this year.

It will include new materials, special definitions and acronyms from the lighting sector and product case studies from 18 luminaire manufacturers.

With a working title of CIBSE TM65.X ‘Embodied carbon in Lighting Equipment’, the document makes it easier and quicker do measure the embodied carbon in lighting equipment. There will also be a web-based calculator tool.

It will complement TM66, the CIbse standard for measuring the circularity of a luminaire.

Although both TM65 and TM66 are self-certification standards, a number of organisations are believed to be planning independent verification services.

TM66 itself will be expanded in the coming months to include information for facility managers, and more details on emergency lighting and control equipment.

TM66 co-author Kristina Allison of Cibse’s Society of Light and Lighting says the new TM65 for lighting will help designers, specifiers, engineers and manufacturers better understand embodied carbon in lighting equipment.

Allison, speaking on a Recolight webinar where the launch of the document was revealed, said the publication ’speaks to the lighting industry.

‘It focuses on embodied carbon from a lighting perspective,’ says Allison. ‘It includes product construction, the use phase and its end of life.

‘Remember, it’s not a life cycle analysis but gives a very reasonable assumption of the amount of embodied carbon equivalent within a luminaire or lighting equipment.’

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Ray Molony

Recolight Report is an independent guide to the latest developments in sustainable and circular lighting. Learn about the people, products, projects and processes that are shaping our industry’s low carbon future. Plus: explainers on the latest innovations, opinion from thought leaders and video interviews with leading disruptors. Edited by lighting expert, editor and industry figure Ray Molony.