Ukukhanya kudlala indima ebalulekile ezimpilweni zethu.Ezingeni eliyisisekelo kakhulu, nge-photosynthesis, ukukhanya kusemsuka wokuphila ngokwako.Ucwaningo lokukhanya luye lwaholela ekuthembiseni eminye imithombo yamandla, intuthuko yezokwelapha esindisa ukuphila kubuchwepheshe bokuxilongwa nokwelashwa, i-inthanethi enesivinini esilula nokunye okuningi okutholakele okuguqule umphakathi futhi kwalolonga ukuqonda kwethu indawo yonke.Lobu buchwepheshe bathuthukiswa emakhulwini eminyaka ocwaningo oluyisisekelo mayelana nezakhiwo zokukhanya - kusukela emsebenzini ka-Ibn Al-Haytham, i-Kitab al-Manazir (Book of Optics), eyanyatheliswa ngo-1015 futhi kuhlanganise nomsebenzi ka-Einstein ekuqaleni kwekhulu lama-20, okuyinto yashintsha indlela esicabanga ngayo ngesikhathi nokukhanya.

IUsuku Lokukhanya Lwamazwe Ngamazweibungaza indima edlalwa ukukhanya kwezesayensi, amasiko nezobuciko, imfundo, nentuthuko esimeme, nasezindaweni ezihlukahlukene njengezokwelapha, ezokuxhumana, namandla.Lo mgubho uzovumela imikhakha eminingi ehlukene yomphakathi emhlabeni wonke ukuthi ibambe iqhaza emisebenzini ekhombisa ukuthi isayensi, ubuchwepheshe, ubuciko namasiko kungasiza kanjani ukufeza izinjongo ze-UNESCO - ukwakha isisekelo semiphakathi enokuthula.

Usuku Lokukhanya Lwamazwe Ngamazwe lugujwa mhla ziyi-16 kuNhlaba minyaka yonke, isikhumbuzo sokusebenza ngempumelelo kokuqala kwe-laser ngo-1960 nguchwepheshe wefiziksi nonjiniyela, uTheodore Maiman.Lolu suku luwubizo lokuqinisa ukubambisana kwezesayensi nokusebenzisa amandla alo ukuze kugqugquzelwe ukuthula nentuthuko esimeme.

Namuhla uMeyi 16, usuku olufanele ukukhunjulwa nokubungazwa kwawo wonke umuntu okhanyayo.Lo mhlaka-16 Meyi wehlukile kweyedlule.Ukuqubuka komhlaba wonke kwesifo esisha somqhele sekwenze ngamunye wethu waba nokuqonda okusha ngokubaluleka kokukhanya.I-Global Lighting Association okukhulunywe ngayo encwadini yayo evulekile: Imikhiqizo yokukhanyisa iyizinto ezidingekayo zokulwa nalolu bhubhane, futhi ukuqinisekisa ukuhlinzekwa okuqhubekayo kwemikhiqizo yokukhanyisa kuyisenzo esibalulekile sokulwa nalolu bhubhane.