Photoluminescence and fluorescence lifetime measurements have become an important tool in the study of photofunctional materials within many disciplines due to the fact that fluorescence lifetime is independent of signal intensity due to external factors like scattering and absorption. Model C4780 Picosecond Fluorescence Lifetime Spectroscopy System utilizes Hamamatsu's unique two-dimensional photon-counter to provide a complete time-resolved spectrum in a single measurement. This unique system simplifies the study of - for example - energy transfer in photofunctional materials by providing simultaneous measurement of spectra and lifetime decays, without the need of lengthy scanning and added stress on the sample. Model C9136 Fluorescence Lifetime Imaging Microscopy (FLIM) System is a specialized system for working under a microscope, yielding two-dimensional (X-Y) lifetime images. The main application area is FRET imaging in cell biology.