Lighting design using computer–aided design systems is an urgent and in-demand necessity that is being actively improved. The possibilities of importing and exporting 3D- models of objects into circuit modeling programs are considered, and the supported formats of 3D models of objects in three-dimensional modeling programs are compared. The main formats of photometric data files used in each of the programs for working with lighting projects are listed, examples of correct and incorrect import of three-dimensional models of objects for further work on creating lighting projects are given. The ways of solving the problems of importing and exporting object models, taking into account the textures scaled on the model itself, are proposed. The programs are considered with the allocation of opportunities and features of work in each of them. Various additions to the programs aimed at working with textures for three-dimensional objects are presented.

Keywords: automation of lighting modeling, import, export, 3D object model, texture, program, data format, lighting design

The article presents the results of evaluation of photobiological efficiency of technological LED lighting in growing cucumber plants Svyatogor F1 variety under light culture conditions. In the experiment phyto-irradiators (FI) with high-pressure sodium lamps of DNAT type (control variant), as well as LED FI of combined spectrum were used. On the basis of photobiological experiments it was found that the emission of OP2 (where radiation with  = 730 nm was 3.1 times more and radiation with  = 660 nm 1.23 times less than in the emission spectrum of OP3) was more effective, providing not only better quality of cucumber seedlings but also higher productivity. The practical significance of the obtained results is shown.

Keywords: phyto-irradiator, LED light source, light-culture, photobiological research, radiation spectrum, photosynthetically active radiation, photosynthetic photon irradiation, cucumber plant