igama elithi "actinometrical" alikho kusichazamazwi sesiNgisi. Kungase kube ukupela okungalungile kwe-"actinometric," okuhlobene nesilinganiso sobukhulu bemisebe yelanga. I-Actinometry igatsha le-photometry elibhekene nesilinganiso sobukhulu bemisebe, ikakhulukazi ilanga. Ngakho-ke, i-"actinometric" isho noma yini ehlobene ne-actinometry noma ukukala kwemisebe yelanga.