In order to research global collaborative applications among nations, a high performance global network like GLORIAD is indispensable. KISTI is a member of GLORIAD and has built, operated and maintained GLORIAD-KR which is a part of GLORIAD in Korea. KRLIGHT based on GLORIAD-KR is one of the GOLEs, lambda's exchange point of GLIF, in Korea. KRLIGHT connects to 12 international partners that are made up of three GOLEs, four NRENs and four research organizations. Researchers who request dedicated network service internationally can use global lightpaths that provisioned dynamically or manually for their advance scientific applications over GLORIAD-KR and KRLIGHT. KISTI has supported several demonstrations for advanced applications and test-beds that are using global lightpaths provisioned: HPDMnet, Astronomy Application, High Energy and Nuclear Physics, Medical Application, etc. KISTI will continuously contribute to more collaborative scientific researches and global applications.