In this study, the TL dosimetric properties of α-Al2O3:C dosimeters were investigated within the diagnostic radiology energy range, using different radiation sources (beta, gamma, and X-ray). The TL glow curve kinetic parameters of the dosimeter were calculated using different methods such as initial rise, fractional glow, various heating rates and numerical methods of computerized glow curve deconvolution (CGCD) and peak shape (PS) methods. As a result, the activation energy of the dosimetric TL peak, (Tmax = 170 °C) was obtained as ⁓1.28 eV with 25% uncertainty in all methods. Furthermore, the dosimetric properties of this dosimeter, essentially dose response, energy dependency, fading effect, repeatability, and minimum detectable dose, were investigated. For high doses under a beta source (1 Gy–1 kGy) a linear behavior up to 40 Gy was observed, on the other hand, perfect linear response was obtained for all three X-ray energies (60, 80, 100 kVp). In addition to those two parts, the handling and light-induced effect of the dosimeter were investigated for daylight, ultraviolet lamp (UV-254 nm) fluorescent, and red and blue LEDs. The results of the light-induced effect following irradiation showed that the TL intensity was rapidly affected in the case of daylight, exhibiting a reduction of ⁓99% after 30 min of exposure. The effect of red and blue LEDs was observed to be approximately ⁓58% and ⁓64%, respectively. However, relatively less intensity loss was observed for ultraviolet and fluorescent after 120 min, with values of 75% and 39%, respectively.