Atomic hydrogen is predicted to form fractional Rydberg energy states H(1/p) called "hydrino atoms" wherein n = 1/2, 1/3, 1/4, ..., 1/p (p <= 137 is an integer) replaces the well-known parameter n = integer in the Rydberg equation for hydrogen excited states. The transition of H to a stable hydrino state H[a(H)/p = m + 1] having a binding energy of p(2).13.6 eV occurs by a nonradiative resonance energy transfer of m.27.2 eV (m is an integer) to a matched energy acceptor such as nascent H2O that has a potential energy of 81.6 eV (m = 3). The energy transfer to the HOH catalyst results in its ionization wherein the charge build up may become limiting of the further propagation of the catalysis reaction. An applied, low-voltage, high current was predicted to ameliorate this space charge inhibition of the hydrino reaction. To achieve these conditions, a solid fuel was used that comprises a highly conductive matrix such as a metal powder with bound or suspended H2O that served as the source of HOH catalyst and H. When the high current was applied, the H2O-based solid exploded with a tremendous burst of optical power as recorded with highspeed video and spectroscopically. The power density was confirmed to be about 3 x 10(10) W/liter of fuel volume using the measured time of the event and the energy released as measured by bomb calorimetry. The predicted molecular hydrino H-2(1/4) was identified as a product by Raman spectroscopy, photoluminescence emission spectroscopy, and X-ray photoelectron spectroscopy (XPS). Copyright (C) 2014, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.