 The study aimed to evaluate the effects of HPS and LED assimilation lighting, LED interlighting on cucumber yield and fruit quality during autumn cultivation, as well as assess the potential for increasing plant density using LED technology. The results showed that HPS plus LED or 100% LED lighting led to higher yields and more balanced fruit quality compared to traditional overhead HPS lighting, and also suggested that increasing plant density is feasible with LED lighting. This article was authored by Katarzyna Kowalczyk, Janina Gajkulska, Dawid Bajalski, and others.