Looking to reduce their carbon emissions by leveraging New York City Local Law 88 (LL88) compliance, the YMCA of Greater New York recently completed lighting upgrades in all 22 of its branches in the five boroughs. While the Climate Mobilization Act has been the focus of much industry discussion, LL88 has not received much attention despite its potential as a key driver for carbon reduction. Under LL88, all buildings greater than 25,000 sqft must install facility-wide lighting and lighting control upgrades that adhere to the New York City Energy Conservation Code (NYCECC) by 2025. The YMCA is one of the first to proactively undertake this ambitious work, upgrading all 1.4 million sqft of their offices, gyms, schools, hotels, and housing – many of which are 24/7 spaces. This massive upgrade was done with an emphasis on deep energy and carbon savings, high-quality lighting aesthetics, and incorporation of consistent and easily serviceable LED lighting products throughout the branches. Overall, these upgrades resulted in 2,500 tons of annual carbon reduction and nearly $700,000 in annual savings. This session provides an opportunity to learn from the project team about what stakeholders must collaborate early-on in order to fully harness LL88 for deep carbon savings, the benefits and challenges of early compliance with LL88, and the difficulties encountered in the planning and installation process. We will discuss the YMCA’s motivation and process for pursuing the project, Gotham 360’s role providing guidance and facilitation, and EN POWER GROUP’s role as the implementer.