Embodiments of this invention relate to and, more particularly, to solid state lighting, digital displays, conversion of electrical energy to light, low onset gain saturated stimulate emission, light production with high efficiency and high output per area, and light production while limiting material degradation, and may also be applied in optical or quantum information processing and networking. Embodimenta of this invention comprise spectroscopic configurations having a radiative transition to a depopulated state and an optical configuration having sufficient Q such that the combination allows onset of gain saturation with a small excited state population or low current density, thus enabling production of light in a mode with near total output coupling, high efficiency, high output, low roll-off and attenuation of losses and degradation processes.
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