Abanye abantu bayazibuza ukuba iibhedi zokuthambisa i-tan zisebenzisa “ukukhanya kwelanga” okanye ukuba ilanga ngokwalo lisebenza ngendlela efanayo nebhedi yokuthambisa i-tan. Impendulo ithi hayi — iibhedi zokuthambisa i-tan azisebenzisi ukukhanya kwelanga kwendalo. Endaweni yoko, zisebenzisa izibane ze-ultraviolet (UV) ezenzelwe ukulinganisa iindawo ezithile zemitha yelanga.
1. Ukukhanya kwelanga vs. Ukukhanya kwebhedi yokuthanjiswa kwelanga
Ilanga: Livelisa umxube wendalo we-UVA, i-UVB, kunye nokukhanya okubonakalayo. Imitha ye-UVB inceda umzimba ukuba uvelise i-vitamin D, ngelixa imitha ye-UVA ingena nzulu eluswini kwaye ibangele ukutsha kunye nokwaluphala.
Iibhedi zoKuthambisa: Sebenzisa iibhalbhu ezinamandla aphezulu ezikhupha imisebe ye-UVA (malunga ne-95%) kunye nenani elincinci le-UVB (malunga ne-5%). Olu xube lunamandla kwaye luxineneyo kunokukhanya kwelanga okuqhelekileyo.