Let's take everything out and put it on the table so we can be more careful.
Here are the different sides of the main light, and let me show you.
The following is the photo of the spare parts, including ratchet pulley, metal rope, and power cord
Now I hang up this light, put it straight and flat, and set up a coordinate system for spatial measurement of this light according to my previous practice of doing evaluation. As shown in the figure below: from the bottom of this light, which is the center point of the light bead face, vertically downward, is the z-axis. From the center of the bead face, the centerline parallel to the long side of the rectangle is the X-axis, and the centerline parallel to the short side of the rectangle is the Y-axis.
Let me show you our measuring instruments again. We take these two meters, and we put them on the Z-axis, 24 inches above the light, and we measure them.
Here is the spectrum that we measured with this instrument, and we took it out of the instrument, and you can see that the spectrum is pretty good.
Here is the spectrogram of the plants grow light under the brand Fluence, which is very well known in the plants grow light industry
We can see that this light in the most important red light band is very good to meet our planting requirements, but although the red light segment is good, but some other band is not satisfactory, we had better add a low power HPS high-pressure sodium lamp, or CMH metal halide lamp to make up for it.
3.1. Let's first measure the spatial distribution of the light quantum flux density of this light
We placed the measuring mesh cloth with the dimensions I had drawn before directly under the light, and then measured the quantum flux density of light at each point on the mesh cloth by setting the distance between the light bead and the mesh cloth as 12 inches, 18 inches, and 24 inches respectively.
The whole process is quite complicated, that is, constantly changing the position and height. I have sorted out the specific measurement values for you and marked them directly on the measuring grid. As shown in the following three pictures.
Let's take the data from the above three measurements, and from the side view, we can make the following conical light distribution map.
A plants grow lights, how much can cover area of the simple calculation method is, to turn the light on a certain height to ensure that the center of photosynthetic photon flux density effectively (PPFD) value is 200 mu mol/m ^ 2 / s, and then find the photosynthetic photon flux density (PPFD) effective value is 150 mu mol/m ^ 2 / s boundary distance of center distance, in the radius scope, can meet the demand of plants in seedling stage lighting.
Let's look at the effective exposure data of this light in this way
3.2. How much area can this plants planting light cover if it is used for seedling cultivation?
The appropriate illumination intensity of plants seedlings was 200±50 mol/m^2/s. We chose a small pot with a square mouth and the size of the pot mouth was 3.93 inches (10 cm). ECO FARM LED GROW LIGHT can cover 11.11 square feet (1.03 square meters), or 81 plants.
Using ECO FARM LED GROW LIGHT 210w-gll-dxg in the nursery, the top of the plant was about 25.50 inches (64.77 cm) from the light, and the maximum coverage radius was measured at 11.00 inches. As shown in the figure below.
If the ECO FARM LED GROW LIGHT is used on a large scale in a nursery area, a light can cover 3.33 feet times 3.33 feet equals 11.11 square feet. Because of the large area, the lights will stack up, and the edges will reach PPFD: 150 mol/m^2 s. As shown in the figure below.
According to the above data, the intensity of this light is not high, the illumination range is not large, and the coverage area is too small during the growing period and flowering period. Therefore, I choose to use it for seedling breeding.
Of course, if you want to be used in the growing area and flowering period especially the flowering period, it is best to cooperate with an HPS high-pressure sodium lamp or CMH gold halide lamp, so that you can overcome this defect.
The appropriate light intensity for adult plants was: 800±200 mol/m^2/s, and we chose the commonly used medium pot with a square mouth during the growing period and a mouth size of 11 inches (27.94 cm). ECO FARM LED GROW LIGHT can cover an area of 3.21 square feet (0.30 square meters) during the growing season, or four plants.
Using ECO FARM LED GROW LIGHT 210w-gll-dxg in the growing area, the top of the plant was about 13.00 inches (33.02 cm) from the LIGHT, and the maximum radius of coverage was 5.00 inches, according to the measurements. As shown in the figure below.
For large areas where plants is growing and flowering, the LED lights require one light for every 3.21 square feet. Because a large area is uniformly arranged with multiple lights, the lights will be superimposed so that the edges will also reach PPFD: 600 mol/m^2 s. As shown in the figure below.
According to the above data, the intensity of this lamp is not high, the illumination range is not large, and the coverage area is too small during the growing period and flowering period. Therefore, I choose to use it for seedling breeding.
Of course, if you want to be used in the growing area and flowering period especially the flowering period, it is best to cooperate with an HPS high-pressure sodium lamp or CMH gold halide lamp, so that you can overcome this defect. You can contact Mary, director of product sales at ECO FARM GREEN INC., whose engineers will help you design the arrangement of a variety of plants plants for free.
I finally took this light apart to see the inside situation, let's first look at the situation of the light bead, from the details of the light bead, this light bead is the Korean brand SAMSUNG light bead. This kind of light bead is the main application in the grow light industry at present. It has a high photosynthetic quantum number efficiency and is a lamp bead that saves electricity.
Finally, let's take a look at the heat dissipation of this light. The aluminum substrate of this one is directly connected to the large aluminum alloy heat dissipation plate behind it. The aluminum substrate is very thick, with large heat capacity. And the lamp has a small fan inside to help dissipate heat.
Judge from a few details above, this light, true quality is good. Mary, director of product sales at ECO FARM GREEN INC., told me they offer a three-year warranty on the light, with free warranty and replacement service for three years. I think the quality of this lamp will not be any problem after three years.
Finally, we will be the light for a period of time, to see the actual power consumption, we use an electric power testing instrument to actually look at this light is really save electricity, first of all, we look at its instantaneous power, the display is 212.6 w with instructions for the 216 w is similar, instantaneous power near the average power fluctuation is a normal phenomenon.
As can be seen from the picture, we have lit this light for 141 minutes in total, and the actual electricity consumption is only 0.50kwh, while that for 24 hours is 1440min. In this way, the electricity consumption for 24 hours in a day is about 0.50*1440/141=5.11kwh
At $0.125 a kilowatt a day in the U.S., you could cover 11.11 square feet of plants growing space for $0.638 a day.1 square foot (sq.ft)=0.092903 square meters (sq.m), which is the area that can cover 1.03 square meters.
If your seedling area is an area of 10 square meters (107.6sq.ft) with a width of 2 meters and a length of 5 meters, 10 of these lamps will be enough. The lighting time for seedling breeding is usually only 16 hours per day.
Finally, I will give you a summary of the actual measurement of this light, this light has the following five advantages:
(1) the spectrum is very good, very close to the spectrum of the authoritative plants cultivation light of the Fluence brand.
(2) the illumination area is relatively large, which can be regarded as a relatively large area in 216-watt plants grow light.
(3) the quality is really excellent, the main core components are the brand products produced by big factories, the application of three years should not be bad.
(4) the price is really cheap. You can hardly find a cheaper 216-watt plants light on the market.
(5) this light has two switches, which can be adjusted to completely adjust the light according to the growth of the plant. So this is very favorable for some small farmers, the pot seedling stage can turn the light power is small, the growth and flowering again big, just a light can meet the growing plants , and also can choose the appropriate power and not waste electricity, it is for small farmers tailor-made products.
At this point, we have completed the evaluation of this light. If you are interested in this light or other products, you can contact Mary, product sales director of ECO FARM GREEN INC., LTD. Her contact information is: her mobile phone number is [+86 13965088976], WhatsApp is [+86 13965088976] and Facebook messenger is [Eco Farm Yang].
Finally, I am very happy to share all kinds of interesting things about plants with you. Please also help me post this assessment thumb up, forward it and comment on it so that more people can see it and we can have more influence.