The spectrum sp1 of the plant lamp refers to the spectral component with a wavelength range of 400~700nm
The spectrum sp2 of plant lamps refers to the spectral range of photosynthetically active radiation (PAR), which is 400~700nm.

The SP9 Spectrum deliver targeted PAR light in the focused wavelength of blue and red with the highest photosynthetic efficiency. This PAR light is proven to support optimal photosynthesis and improved plant development and morphology. 

Generally speaking, PAR (Photosynthetically Active Radiation) refers to the spectrum that can effectively stimulate plant photosynthesis.

1. Effect of light on growth

In the natural spectrum, the effects of light of different wavelengths on plant growth are as follows:

a) 280~315nm has minimal impact on morphology and physiological processes;

b) 315~400nm, chlorophyll absorbs less, which affects the photoperiodic effect and hinders stem elongation;

c) 400-520nm (blue light), chlorophyll absorption rate is maximum, promoting photosynthesis;

d) 520~610nm, the pigment absorption rate is not high, which reduces photosynthesis;

e) 610~720nm (red light), with low chlorophyll absorption rate and significant impact on photosynthesis and photoperiod;

f) 720~1000nm, low absorption rate, stimulates cell elongation, affects flowering and seed germination;

g)>1000 nm is converted into heat.

SP1 may represent a spectrum configuration rich in blue light, suitable for the initial stage of plant growth; SP2 may represent a spectrum configuration with a balance of blue and red light, suitable for the vigorous growth period of plants; and SP9 may represent a spectrum configuration specific to a certain plant or growth condition.

However, these are just speculations based on general knowledge. In fact, the specific meanings of SP1, SP2, and SP9 may vary from manufacturer to manufacturer or product to product. In order to obtain accurate information, it is recommended to directly refer to the instructions of the relevant plant lamp products or contact the manufacturer for consultation.

In addition, it should be noted that the spectral parameters of plant lamps have an important influence on the growth and development of plants. Therefore, when choosing a plant lamp, the appropriate spectral configuration should be selected according to the actual needs and growth conditions of the plants. At the same time, care should be taken to avoid the problem of false labeling of spectral parameters to ensure that plants can obtain sufficient and suitable light conditions.

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