Ka taea te whakamātautau i te mātotoru o te mana o te mārama mai i tētahi taputapu whakaora LED, taiaho rānei mā te whakamahi i tētahi 'mita mana o te rā' – he hua e aro nui ana ki te mārama i roto i te awhe 400nm – 1100nm – ka puta he pānui i roto i te mW/cm², i te W/m² rānei (100W/m² = 10mW/cm²).
Mā te mita hiko o te rā me te rūrū, ka taea e koe te ine i te mātotoru o te hiko o te mārama mā te tawhiti.
Ka taea e koe te whakamātautau i tētahi rama LED, i tētahi rama taiaho rānei hei kimi i te kaha o te hiko i tētahi wāhi kua whakaritea. Kāore e taea te whakamātautau i ngā rama whānui pēnei i ngā rama mura me ngā rama wera, heoi, nā te mea he nui te putanga kāore i roto i te awhe e tika ana mō te whakaora mārama, nō reira ka pupuhihia ngā pānui. Ka homai e ngā taiaho me ngā rama LED he pānui tika nā te mea ka tukuna e rātou he roangaru +/-20 noa iho o ō rātou roangaru kua tohua. Ko ngā mita hiko 'rā' he mea hanga mō te ine i te hihi o te rā, nō reira kāore i tino tika te whakarite mō te ine i te mārama rama LED kotahi te roangaru – he ahua noa iho ngā pānui engari he tika. Kei reira ngā mita rama LED tika ake (me te utu nui).