Isithsaba Sefotochromic I-Or2 sisakhiwo esinye sophahla esihambelana nokukhanya kwelanga. Amacandelo e-polygonal omphezulu asabela ekukhanyiseni kwe-ultra-violet, enza imephu kwindawo kunye nobungqingqwa beemitha yelanga. Xa usemthunzini, iziqwenga zeOr2 zimhlophe mhlophe. Nangona kunjalo xa bethwa yimitha yelanga iba yimibala, izele zizikhukula ezantsi ngezikhanyiso ezahlukeneyo zokukhanya. Emini u-Or2 uba sisixhobo esishukumisayo esilawula kuphela indawo engezantsi kwayo. Ngobusuku i-Or2 iguqula ibe yi-chandelier enkulu, isasaza ukukhanya okuqokelelwe ziiseli ze-photovoltaic ezihlanganisiweyo emini.