Borosil is the manufacturer and exporter of industrial and lighting products. They offer airfield lighting. These are made from low expansion borosilicate glass for its thermal and chemical stability and good optical transmission properties. These are currently three products manufactured which have successfully undergone field tests.
Some of which are :
[a] photometric test
[b] thermal shock test
[c] dimension stability test
[d] ball drop test
[e] shower test