  We study the light output, light collection efficiency and signal timing of a
variety of organic scintillators that are being considered for the upgrade of
the hadronic calorimeter of the CMS detector. The experimental data are
collected at the H2 test-beam area at CERN, using a 150 GeV muon beam. In
particular, we investigate the usage of over-doped and green-emitting plastic
scintillator, two solutions that have not been extensively considered. We
present a study of the energy distribution in plastic-scintillator tiles, the
hit efficiency as a function of the hit position, and a study of the signal
timing for blue and green scintillators.
