Ubuningi bamandla okukhanya okuvela kunoma iyiphi idivayisi ye-LED noma ye-laser bungahlolwa nge-'solar power meter' – umkhiqizo ovame ukuzwela ekukhanyeni okusebangeni elingu-400nm – 1100nm – onikeza ukufundwa ku-mW/cm² noma ku-W/m² (100W/m² = 10mW/cm²).
Ngemitha yamandla elanga kanye nerula, ungalinganisa ubukhulu bamandla akho okukhanya ngebanga.
Ungahlola noma iyiphi i-LED noma i-laser ukuthola ubukhulu bamandla endaweni ethile. Izibani ezigcwele njenge-incandescents kanye nezibani zokushisa azikwazi ukuhlolwa ngale ndlela ngeshwa ngoba ingxenye enkulu yokukhishwa ayikho ebangeni elifanele lokwelashwa kokukhanya, ngakho-ke ukufundwa kuzokhushulwa. Ama-Laser nama-LED anikeza ukufundwa okunembile ngoba akhipha ubude be-wavelength +/-20 kuphela bobude be-wavelength obushiwo. Amamitha kagesi 'elanga' ngokusobala ahloselwe ukulinganisa ukukhanya kwelanga, ngakho-ke awalinganiswanga kahle ukulinganisa ubude be-wavelength eyodwa ukukhanya kwe-LED - ukufundwa kuzoba yisibalo se-ballpark kodwa kunembe ngokwanele. Amamitha okukhanya e-LED anembe kakhulu (futhi abizayo) akhona.