This issue of the Photonics Letters of Poland contains ten papers that are related to broadly defined photonics, optics and optoelectronics. Many different aspects are described, including those linked to light and illumination, such as the colored light pollution in the urban environment, the light color quality of LEDs operating at winter temperatures, comparison of luminance distribution on the lighting surface of power LEDs, and the role of light in the plants world. In addition, the optical characterization of tissue-simulating phantom components and the studies on the hyper-Rayleigh scattering first hyperpolarizability of a chalcone derivative in various solvent media are shown. Results of the thermal analysis and CW laser operation in end-pumped TM:YAP lasers, as well as the high-power, 100 W-class, thulium-doped all-fiber lasers are also presented. Finally, the projection of holographic images in volumetric fluorescent fluids for near-eye displays and the fabrication of polymer micro-lenses for low-cost light coupling into integrated waveguide circuits are discussed.