Is the plant growth lamp really useful for vegetables?

Generally speaking, vegetables and plants should grow better in the sun. Because different vegetables have different requirements for light at different growth stages. Plant growth lamp can make up for the shortage of light source.

Since plants were born on the earth, they mainly rely on sunlight for photosynthesis. Plants can't grow without sunlight, water and air. Under special circumstances, plants can use fluorescent lamps for photosynthesis. For example, the ultraviolet germicidal lamp does not need to be converted into visible light, and can play a good bactericidal role at the wavelength of 250nm-260m, which can sterilize. But for most plants, artificial light source has limited energy and small photosynthesis. Sunlight mainly comes from nature, and plant growth still cannot completely replace the natural light source-sunlight.