IiBhalbhu zeglasi eHard, ezenziwe ngeglasi ye-borosilicate, zibonelela ngokumelana nobushushu obuphezulu, ukumelana neekhemikhali, amandla omatshini, ukuzinza kwe-thermal, kunye nokucaca okugqwesileyo kwamehlo. Ziyimfuneko kwishishini lokukhanyisa kwi-LED encapsulation, ukubonelela ngokhuseleko kunye nokuzinza, njengezindlu zeetyhubhu ze-fluorescent, ukuqinisekisa ukuqina kunye nokuhanjiswa kokukhanya okusebenzayo, kunye nezisombululo ezikhethekileyo zokukhanyisa i-LED njengezibane zemoto kunye nezixhobo zoshishino, ukuqinisekisa ukusebenza okuthembekileyo kwiindawo ezifunwayo.