The light output of organic scintillators is traditionally given as a percentage of the light output of Anthracene. Anthracene is an organic crystal that is not commercially available. On this scale, the light output of NaI(Tl) is about 210%. A better number for PVT based plastic scintillators is 104 scintillation photons per MeV deposited into the scintillator. That number is good for Minimum Ionizing Particles (MIPs) such as fast electron and cosmic ray muons. Heavier and/or more ionizing particles such as protons and alpha particles produce few photons per unit energy deposited. The relative light yield by particle type is shown in a chart in the SGC Organics brochure. The energy deposition rate for MIPs in plastic scintillators is 2 MeV/cm.