Ukwelashwa ngokukhanya okubomvu kusebenzisa ubude begagasi bendalo obuthile bokukhanya ngezinzuzo zokwelapha, kokubili ezokwelashwa nezimonyo. Kuyinhlanganisela yama-LED akhipha ukukhanya kwe-infrared nokushisa.
Ngokwelashwa kokukhanya okubomvu, uveza isikhumba sakho elambuni, kudivayisi, noma ngelaser ngesibani esibomvu. Ingxenye yamangqamuzana akho ebizwa ngokuthi i-mitochondria, ngezinye izikhathi ebizwa ngokuthi "amajeneretha amandla" amaseli akho, ayicwilise futhi enze amandla engeziwe.