Recently, some solutions (such as UCLP, GARA and GridJIT, etc.) have been proposed to manage optical network resources as other grid resources. However, most of them are focused on using grid technologies to encapsulate the management and control functions of optical control plane. And actually, they do not perform schedule optical network resources as grid resources. This paper proposes an economic-based scheme for lightpath resources scheduling and leveraging in grid-enabled optical networks. We also present the scheduling model and algorithm, and finally demonstrate their effectiveness by experiments on GridSim.