(1) Ulwazi lwemveliso kunye noyilo lunokuboniswa ngaphambili, ngasemva nasecaleni.
(2) Inokuthintela ukukhanya kwe-UV, ioksijini kunye nokufuma ngaphandle, kwaye ugcine ubutsha ixesha elide.
(3) Ibhegi yokupakisha yetyhubhu ibonakala icocekile kwaye intle.