“…The balanced models and software applications based on them (the LED's thermal resistance calculation models [2], taking into account the infrared radiation effects [6], p-n junction temperature change [4], as well as CFD-simulation [7]) are the mostly widely used. However, many experiments [3,5,6,8,9] with different LEDs showed that the balanced models application domain is very limited. Particularly, the balanced models provide the approximate, quite significantly different from the real, processes at an intensive heat release or an energy absorption due to the chemical reactions and phase transformations (melting, crystallization).…”