One of the principal tasks for the design of the Mexican synchrotron was to define the storage ring energy. The main criteria for choosing the energy come from studying the electromagnetic spectrum that can be obtained from the synchrotron, due to the energy range of the spectrum that can be obtained will be the applications available to the users of the future light source. Since there is a several demand of hard x-rays for the experiments in the synchrotron community users from Mexico, in this work were studied the emission spectra from some hard x-ray sources which could be the best options for the parameters of the present Mexican synchrotron design. The calculations of the flux and the brightness for one Bending Magnet and four Insertion Devices are presented; specifically, for a Superconducting Bending Magnet (SBM), a Superconducting Wiggler (SCW), an In Vacuum Short Period Undulator (IV-SPU), a Superconducting Undulator (SCU) and for a Cryogenic Permanent Magnet Undulator (CPMU). Two commonly available synchrotron radiation programs were used for the computation. From the results, it can be concluded that the particle beam energy from the current design is enough to have one or more sources of hard x-rays. Furthermore, a wide range of hard x-ray region can be covered by the analyzed sources, and the choice of each type should be based on the specific characteristics of the x-ray beam to perform the experiments at the involved beamline. This work was done within the project Fomix Conacyt-Morelos “Plan Estratégico para la construcción y operación de un Sincrotrón en Morelos” (224392).