Can you use grow lights without any darkness?

No, plants cannot grow without any darkness. Darkness is an essential part of the plant growth cycle, as it signals to the plant that it is time to rest and conserve energy. Plants have evolved to follow a 24-hour day-night cycle, known as the circadian rhythm. During the day, plants use light energy from the sun or grow lights to produce food through photosynthesis. At night, the absence of light signals to the plant that it is time to rest and conserve energy. If plants are exposed to light 24 hours a day, they may experience stress and become stunted or even die. For this reason, it is important to provide plants with a regular dark period, typically 12-14 hours per day, in order to ensure healthy growth. When growing plants with grow lights, it is important to provide a regular light-dark cycle, just as plants would experience in nature. This will help to ensure that the plants receive the rest and energy conservation they need for healthy growth and development.