1. Rerewharewha:
Ko te pūngao ka tukuna e te puna marama ki roto i te mokowā a tawhio noa mo ia waeine wa, ka puta te tirohanga tirohanga ka kiia ko te rere marama Φ Ka tohuhia i roto i te lumens (Lm).
2. Te kaha marama:
Ko te rewharewha o te rama e whitihia ana e te puna rama i roto i te ahunga motuhake i roto i te koki totoka o te waeine ka kiia ko te kaha marama o te puna marama ki tera huarahi, e kiia ana ko te kaha marama mo te poto.E tohuhia ana e te tohu I, i te candela (Cd), I= Φ/ W 。
3. Tiaramatanga:
Ko te rewharewha marama e whakaaetia ana i runga i te ara rererangi waeine e kiia ana ko te whakamarama, e whakaatuhia ana i te E, a ko te waeine he lux (Lx), E= Φ/S .
4. Tirohanga:
Ko te kaha kanapa o te whakamarama i runga i te waahanga matapae i te ahunga kua tohua ka kiia ko te wherikotanga, e whakaatuhia ana i roto i te L, a ko te waeine he candela mo ia mita tapawha (Cd/m).
5. Te pāmahana tae:
Ina he rite te tae e tukuna ana e te puna marama ki te tae e tukuna ana e te pango i wera ki tetahi pāmahana, ka kiia ko te pāmahana tae o te puna marama, ka whakapotohia ko te pāmahana tae.
Ko te hononga whakawhiti tika o te utu rama rama rama
Ko te rewharewha o te 1 lux=1 lumen kua tohatoha rite ki runga i te horahanga 1 mita tapawha
1 lumen=rerenga kanapa ka tukuna e te puna rama ira me te kaha kanapa o te rama 1 i te koki totoka wae
1 lux= te rama i hangaia e te puna rama ira me te kaha kanapa o te 1 rama i runga i te awheawhe me te 1 mita te torotoro