###### Abstract
All these sources are characterized by a narrow (monochromatic) emission spectrum (the typical width of the emission line (band) is ~2 nm for mercury lamps and ~10 nm for excimer lamps and LEDs) and the low irradiance of biological objects (on the order of several milliwatts per square centimeter or less). However, these physical factors can lead to several limitations on the applications of therapeutic technologies using them. Given the monochromaticity of radiation, the inactivation of microorganisms has a pronounced, selective nature (that is, the death of a pathogen occurs only if its absorption spectrum coincides with the emission spectrum of the lamp). Low-intensity radiation requires long exposure times and does not enable the effective treatment of massively contaminated wounds. Thus, in [29], in an in vivo study on the antimicrobial effects of UV radiation with a wavelength of 254 nm, achieving a 10-fold decrease in the bacterial load in mouse wounds infected with _Pseudomonas aeruginosa_ and _Staphylococcus aureus_ required sufficiently large (hyper)timeic) single doses of UV-C radiation--2.59 J/cm\({}^{2}\). Similar doses of UV-C radiation (2.8 J/cm\({}^{2}\)) were also used in clinical trials to study the effectiveness of UV-C therapy in difficult-to-heal ulcers infected with methicillin-resistant _Staphylococcus aureus_ (MRSA) [27]. In another study, antifungal UV-C therapy for _Candida albicans_ contaminated wounds in laboratory animals was carried out at even higher doses of UV-C irradiation (up to ~6.5 J/cm\({}^{2}\)) [30]. This research proposes a new approach to the treatment of wound lesions. It involves treating the wound surface with high-intensity, broad-spectrum pulsed optical radiation, continuously covering the entire UV range (from 200 to 400 nm) and visible and near-infrared spectral regions. As a source of radiation, we propose using pulsed xenon lamps, as they are currently the most technologically advanced high-temperature plasma emitters [31]. Such lamps have many physical and technical features that favorably distinguish them from radiation sources traditionally used in modern phototherapy and suggest their high therapeutic potential and safety. Among the above features, the emission spectrum of a pulsed xenon lamp should be noted first. In optimal power modes, the lamp emits a powerful continuum in the entire spectral transparency window of the quartz bulb of the lamp, i.e., from 0.2 to 2.7 \(\upmu\)m. Various biological objects (microbial cells, subcellular structures, biomolecules, etc.) have different absorption spectra because of their different physical and biochemical organizations. As mentioned, photochemical action occurs only when the absorption spectra of an object and the spectrum of the acting radiation coincide (the first law of photochemistry is the Grottthus-Draper law). By irradiating microbial cells (the bio-object) with a wide spectrum, such a radiation source can effectively affect all types of microorganisms, regardless of their spectral characteristics, as well as all vital cell structures, such as nucleic acids, proteins, biomembranes, etc. Several important conclusions follow from this: (1) a broad optical spectrum potentially provides a wide range of antimicrobial activity: all types of microflora are suppressed, regardless of the individual spectral characteristics of the microorganisms; (2) broad-spectrum UV irradiation of a microorganism has a multichannel destructive effect on all vital cell structures, which reduces the overall resistance of the pathogen (lethal doses decrease) and the possibility of its adaptation to UV exposure; (3) a continuous (identical to solar) emission spectrum could provide synergy to biological effects in different spectral ranges: the strong biocidal effect of short-wave ultraviolet radiation combines with the immuno- and trophostimulating effects of medium- and long-wave UV, visible, and near-IR radiation, potentially creating optimal conditions for the growth of new tissues and accelerated wound healing.