When comparing whether a full-spectrum plant light is better than a red-blue spectrum plant light, we need to consider several factors, including plant type, growth stage, and specific needs. Here is a detailed comparison of the two plant lights:

Full spectrum plant light

Spectral range: The full-spectrum plant lamp simulates the spectrum of sunlight, covering the visible range from 380NM blue to 780NM red. This wide spectral range allows full-spectrum plant lamps to meet the growth needs of a wide variety of plants.
Light efficiency: Full spectrum plant lamps have high light efficiency and large luminous flux, which can provide sufficient light for plants. At the same time, due to the imitation of the solar spectrum, its light color, such as the daylight color at about 10 am, has strong color rendering and small color temperature drift.
Application scenario: Full-spectrum plant lights are suitable for growing different types of plants, including leafy vegetables, fruit trees and houseplants. It can meet the needs of various plants at different growth stages, especially for plants that need comprehensive light.
Red and blue spectrum plant light

Spectral characteristics: Red and blue spectral plant lamps mainly provide the key wavelengths required by plants, namely red and blue light. Red light promotes plant growth and flowering, while blue light contributes to plant morphogenesis and leaf development.
Light efficiency: The light efficiency of red-blue spectrum plant lamps is also high, but its spectral range is relatively narrow, mainly concentrated in the red and blue regions.
Application scenario: Red and blue spectrum plant lights are more suitable for growing specific types of plants, such as leafy vegetables or herbs. For such plants, red and blue light plant lamps provide the critical wavelengths needed to promote growth and increase yield.
Sum up

Full-spectrum plant lights: Suitable for a variety of plant types and growth stages, can provide comprehensive light to meet the broad spectrum needs of plants. High luminous efficiency, large luminous flux and strong color rendering.
Red and blue spectrum plant light: suitable for specific types of plants, such as leafy vegetables or herbs. It mainly provides red and blue light, which promotes the growth and flowering of plants. Light efficiency is also high, but the spectral range is relatively narrow.
Selection suggestions:

If you grow different types of plants, including leafy vegetables, fruit trees and houseplants, it is recommended to choose a full-spectrum plant light because it can meet the needs of a variety of plants.
If you grow specific types of plants, such as leafy vegetables or herbs, and are primarily concerned with growth and yield, then a red-blue spectrum plant light may be better for you.
In some cases, a combination of the full spectrum and red and blue light can be a good choice to achieve precise control of the spectrum to meet the needs of the plant at different growth stages.