Year-round growing of roses is based on using grow-lighting method in the autumn-winter-spring periods of the year. When arranging supplementary lighting, the light day during the illumination period reaches 20 hours per day.
Duration of lighting roses with LED Spectra lamps
| Month | Jan | Feb | Mar | Apr | May | Jun | July | Aug | Sep | Oct | Nov | Dec |
| hrs | 20 | 18 | 16 | 10 | 8 | - | - | - | 6 | 8 | 10 | 20 |
