LEP in Farming

I. Characteristics of the Plant grow lighting series LEP light source

1.1. Characteristics of LEP spectrum

The plant growth lighting series LEP light source is a continuous full-spectrum white light with a spectral wavelength range of 295nm-1800nm. The ultraviolet light and infrared light in the LEP light source are the same as sunlight. Infrared light plays an important role in flowering and the growth rate of plant stems. Ultraviolet light can promote plant growth and development, increase crop yields, promote the synthesis of proteins, sugars, and acids, and even increase the germination rate of seeds, and help control various molds.

LEP is the continuous spectrum closest to sunlight, with a color temperature of 3500K-5000K, invisible light accounting for 30%, visible light accounting for 70%, and the red, green and blue proportions of the visible light part are 41/32/27, which is almost the same as sunlight. The proportion of each wavelength in the spectrum is very close to that of sunlight, see the table below:

Comparison between sunlight and several commonly used electric light sources

1.2. Physical characteristics of LEP light source

LEP light sources all use high-purity quartz bulbs with extremely high light transmittance. They are resistant to high temperatures and can be used for a long time at 1100°C without bursting. Their safety performance is higher than that of ceramic glass bulbs.

With excellent natural heat dissipation performance, the integrated LEP light source (including amplifier, power supply and lamp holder) can keep the temperature as low as 58℃ (room temperature @ 32℃) during long-term operation.

The radiant heat of LEP light source during operation is significantly lower than that of LED.

1.3. Application advantages of the Plant grow lighting series LEP

The power density of the LEP light source of LEP-S-300-V23572-01 reaches above AM1.5 (≥1000W/m2), the irradiation intensity reaches above 1.0Sun, the light energy reaches 32857 lm, the light energy efficiency reaches 132 lm/w, and the photosynthetic photon energy density can reach 428 umol/m2/s. The spectrum matching, irradiation stability and irradiation uniformity with sunlight can reach the AAA level of the international standard for solar simulators. After 50,000 hours of continuous use, the luminous flux still remains above 80%.

The infrared light of LEP light source accounts for about 21%, and the ultraviolet light accounts for 9%, mainly ultraviolet A, and the power is relatively weak. Normal use will not cause harm to the human body, but it can provide the light quality and energy necessary for the growth of organisms.

The research on the lighting effects of different light sources on plant growth by the Hogeschool University in the Netherlands not only saves energy and increases yields, but also truly restores the taste and reduces pests.

Using four light sources of similar power, the growth effects of five plants were studied, and statistical comparisons were made on multiple dimensions such as color, growth rate, flowering, fruiting, taste, and nutritional content of each plant. The research results show that LEP is not only energy-saving, but also has the best growth effect (short growth cycle, high nutritional content, and authentic taste).

In the early stages of plant development, plants under LEP had tighter internode spacing than plants under HPS, grew stronger, faster, and more. The results showed that 230W LEP was far superior to 600W HPS in terms of nutritional performance and flowering and fruiting. The tomatoes under LEP not only had beautiful appearance and uniform size, but also had a particularly strong flavor. In addition, no spider mite infestation was detected on the plants.

II. Technical parameters of the Plant grow lighting series LEP light source

2.1. Parameters of the Plant grow lighting series LEP light source

Product model	LEP-S-300-V23572-01
Product series	Plant grow lighting series LEP Light Source
Spectral range	295 nm-1800 nm
Initial luminous flux	25000 lm
Luminous flux efficiency	100 lm/w
Luminous energy	35714 （lm）
Luminous energy efficiency	144 （lm/w）
CCT	4000K
CRI	72
service life	50000h (≥80%)
AC power	270 W
DC voltage	28 V
Direct current	8.9 A
Dimming control	Customizable
Light output direction	Down ± 30
Intelligent switch	Supported
Opening time	30-60 seconds
Restart time	90-180 seconds (restart automatic protection)
Total weight	3.7kg (lamp head+microwave solid-state source+power supply+connector)
Outer packaging size	L*W*H: 510*240*110mm
Typical spectra (customizable)
Optical output distribution characteristics

2.2 Environmental requirements for LEP light sources

A) Work Environment

Temperature -25℃ to +45℃, humidity 5%-95%.

B) Storage environment temperature

Temperature -40℃ to +80℃, humidity 5%-95%.

2.3. Heat dissipation requirements of LEP light sources

A) Power supply cooling

If the LEP power supply is external, the power supply shell itself can meet the heat dissipation requirements. If the power supply is built-in, the heat dissipation must meet the requirement that the temperature rise is less than 35°C under a 25W heat source.

B) Power amplifier heat dissipation

The power amplifier (microwave solid-state source) must meet the requirement that the temperature rise is less than 35°C under an 80W heat source.

C) System cooling

When the ambient temperature is 30°C, the shell temperature of the entire LEP system must be kept below 70°C to meet safety regulations.

III. Components and dimensions of LEP light source

3.1 LEP lamp head size (IP54)

3.2. Size of microwave solid-state source (IP65)

3.3. Driver power size (IP67)

A) Appearance size

B) Power supply parameters

3.4 Line configuration and overall dimension diagram

4、 Model Naming Rules and Selection Guidelines

remarks: 

1. Color temperature is a range value:

35 (3500K-4500K), 50 (5000K-5500K), 65 (6000K-6500K);

2. Explicit refers to the lowest range value

72 represents the lowest Ra72, 80 represents the lowest Ra80, 92 represents the lowest Ra92, 95 represents the lowest Ra95;

3. Customers can choose or customize light sources with different spectra based on their actual application needs for the same model of LEP light source. We welcome further communication with you, such as:

1) There will be many different spectral options (1-99) for LEP light sources of the same model. We will recommend spectral types that are more suitable for user scenarios based on customer needs;

2) Requirements for the proportion of various light colors such as red, green, blue, etc;

3) Specific color temperature and color rendering index range values;

4. Due to the continuous updating and development of technology, if there is any change in the above technical data, please refer to the quotation.