Introduction To Plant Lights

Plant lamps, as the name suggests, are lighting fixtures used by plants. Plant lights simulate the principle that plants require sunlight for photosynthesis, supplementing or completely replacing sunlight.
Introduction to Plant Lights
The light sources suitable for plant supplementary lighting include: high-pressure sodium lamp, metal halide lamp, ceramic metal halide lamp, microwave sulfur lamp, plasma lamp, fluorescent lamp, electrodeless lamp, tri color rare earth supplementary lighting lamp, LED plant lamp, etc. The most commonly used are sodium lamps for plant supplementary lighting, metal halide lamps, and LED plant lamps. Others are relatively niche or very expensive.
High pressure sodium lamps can be divided into ordinary sodium lamps, high light efficiency sodium lamps, and sodium lamps for plant supplementary lighting. The commonly used ones are 250W, 400W, 600W, and 1000W. The current trend is that the higher the power, the better, because it is simple: one 1000W system is cheaper and has better coverage than two 400W systems.
Ordinary sodium lamps have low prices and low luminous flux, while high efficiency sodium lamps, as the name suggests, have higher luminous flux. However, these are not truly sodium lamps for plant supplementary lighting, they are only used as street lamps.
The sodium lamp used for plant supplementary light must have correct spectrum and high lumen output; Although high luminous efficiency sodium lamps have high lumen output, the content of red and blue light in the spectrum is much lower than that of plant sodium lamps. The useless green light is 7-9 times higher than plant sodium lamps, which can only waste energy under the effect. That's why some customers are asking why the growth effect is not significant. You used the wrong light.
To determine whether a high light efficiency sodium lamp or a plant sodium lamp can only be determined through spectral analysis, and there is currently no method to determine with the naked eye. This is also the reason why many factories are able to deceive farmers without restraint and cause losses to consumers.
Metal halide lamps contain abundant blue light, and even plant sodium lamps with spectral enhancement contain significantly less blue light than metal halide lamps. If sodium lamps and metal halide lamps are used together, they can achieve the same effect. However, considering the cost, sodium lamps are still mainly used in greenhouses. Be careful of unscrupulous merchants when purchasing metal halide lamps. The inner shell of the metal halide lamp is actually a mercury lamp, which is very affordable.