<p>This study aims to evaluate the environmental sustainability of additive manufacturing using recycled materials. Specifically, it investigates the environmental impact of a 3D-printed lamp produced from both virgin and recycled polylactic acid (PLA), through a comparative life cycle assessment (LCA). The research explores whether using recycled PLA can significantly reduce the environmental footprint of 3D printing, supporting more sustainable production practices. A cradle-to-gate LCA was performed on a 3D-printed lamp using the ReCiPe Midpoint methodology and the Ecoinvent 3.8 database. The assessment covered four life cycle stages: raw material extraction, production, use, and recycling. The lamp weighed 235.45 g before removing supports and 110.72 g after cleaning. Virgin PLA was assessed with full environmental burden, while recycled PLA was considered burden-free, assuming the recycling process allocated impacts to the original product and treated waste as a by-product. The LCA results showed that the environmental impact of virgin PLA was substantially higher than that of recycled PLA across multiple impact categories. This finding highlights the advantages of integrating recycled materials into additive manufacturing processes. Key environmental hotspots were identified in the raw material extraction and production phases when using virgin PLA. The use of recycled PLA in 3D printing significantly reduces the environmental impacts associated with the production of printed components. This reinforces the role of recycled materials in supporting sustainable manufacturing and offers guidance for stakeholders to adopt environmentally responsible filament choices. The study contributes to ongoing efforts to improve resource efficiency and minimize the ecological footprint of additive manufacturing.</p>