Idosi yonyango olukhanyayo ibalwa ngale fomyula:
Ubuninzi bamandla x Ixesha = Umthamo
Ngethamsanqa, izifundo zamva nje zisebenzisa iiyunithi ezimiselweyo ukuchaza iprotokholi yazo:
Uxinano lwamandla kwi-mW/cm² (ii-milliwatts ngesentimitha nganye ziphindwe kabini)
Ixesha kwi-s (imizuzwana)
Idosi kwi-J/cm² (iiJoules ngesentimitha nganye ziphindwe kabini)
Ngonyango lokukhanya ekhaya, ubuninzi bamandla ke ngoko yinto ephambili ekufuneka uyazi – ukuba awuyazi, awuyi kukwazi ukwazi ukuba uza kusebenzisa isixhobo sakho ixesha elingakanani ukuze ufumane idosi ethile. Lumlinganiselo nje wokuba ubukhali bokukhanya bungakanani (okanye zingaphi ii-photon kwindawo ethile).
Ngee-LED eziphumayo ezine-engile, ukukhanya kuyasasazeka njengoko kuhamba, kugubungela indawo ebanzi nebanzi. Oku kuthetha ukuba amandla okukhanya ahambelanayo nakweyiphi na indawo aya ebuthathaka njengoko umgama ukusuka kumthombo usanda. Umahluko kwii-engile zemitha kwii-LED nawo uchaphazela uxinano lwamandla. Umzekelo, i-LED ye-3w/10° iya kuveza uxinano lwamandla okukhanya ngaphezulu kune-LED ye-3w/120°, eya kuveza ukukhanya okubuthathaka kwindawo enkulu.
Izifundo zonyango olukhanyayo zidla ngokusebenzisa ubuninzi bamandla obuyi ~10mW/cm² ukuya kuthi ga kwi ~200mW/cm².
Idosi ikuxelela nje ukuba loo mandla asetyenzisiweyo ixesha elingakanani. Ukukhanya okuphezulu kuthetha ukuba kufuneka ixesha elincinci lokusetyenziswa:
I-5mW/cm² esetyenzisiweyo imizuzwana engama-200 inika i-1J/cm².
I-20mW/cm² esetyenzisiweyo imizuzwana engama-50 inika i-1J/cm².
I-100mW/cm² esetyenzisiweyo imizuzwana eli-10 inika i-1J/cm².
Ezi yunithi ze-mW/cm² kunye nemizuzwana zinika isiphumo kwi-mJ/cm² – phinda loo nto ngo-0.001 ukuze ufumane i-J/cm². Ifomula epheleleyo, xa kujongwa iiyunithi ezisemgangathweni, ke ngoko:
Umthamo = Ubuninzi bamandla x Ixesha x 0.001