voltage-current characteristics of the firefly photuris vermontica luminescent luciferin enzyme-catalyzed system (lecs) were obtained. from these measurements, a quantum electronic model was developed for calculating the activation energy (or energy gap) between the lecs electron donor-acceptor energy levels in it excited states. using this activation energy and planck's law or radiation, the wavelength of the lecs luminescence spectra was calculated and compared with that obtained by optical methods. it was found that there is good agreement between these two wavelengths. the fundamental results of this work open up a novel way of studying luminescence in biological systems using principles of semiconductor physics and statistical mechanics. further, it is shown experimentally that the photuris vermontica chemiluminescent lecs behaves like a solid-state light-emitting diode, implying that new synthetic molecular luminescent devices can be fabricated using the lecs electronic properties