Realistic human downlink exposure at 3. 5 and 28 GHz to electromagnetic fields is evaluated for distributed and collocated base stations using a hybrid ray-tracing/finite-difference time-domain method. For the first time. the absorbed power density is computed for distributed massive multiple-input multiple-output (DMaMIMO) 6G base stations at 28 GHz. https://www.marcelovicente.com/product-category/lightener/