Through the use of thesources spectrums 22Na (S311.PH), 60Co (S297.PH), 133Ba (S295.PH), 137Cs (S296.PH) and 152Eu (S285.PH) the properties of Lanthanum Tri-Bromide (LaBr3:Ce) and Lanthanum Tri-Chloride (LaCl3:Ce) scintillation detectors were compared against Sodium Iodide (NaI(Tl)) scintillation and Hyper Pure Germanium (HPGe) semiconductor detectors. In all instances the HPGe detector was found to be superior, So, Hyper Pure Germanium detectors (HPGe) are outstanding devices for radioactivity spectroscopy. In addition the LaBr3:Ce and LaCl3:Ce detectors were always found to be superior to the NaI(Tl) detector.