Now I hang up this light, keep it straight and flat, and set up a coordinate system for spatial measurement of this lamp according to my previous practice of doing evaluation. As shown in the figure below: from the bottom of this lamp, which is the center point of the lamp 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 derived it from the instrument down here, and you can see clearly that the spectrum is pretty good.
Here is the spectrogram of the cannabis grow light under the brand Fluence, which is very well known in the cannabis grow light industry.
You can see that this light in the main blue and red light band is very good to meet our planting requirements, in the 500 to 600 this band is a little unsatisfactory, 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 lamp.
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, 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.
ECO Farm LED 120 W cannabis plantation light photon flux density (mol/m2s experimental measurement map.
Let's take the data from the above three measurements, and from the side view, we can make the following conical light distribution map.
The simple calculation method of how much area a cannabis planting lamp can cover is to find the distance between the boundary and the center point of the photosynthetic effective light quantum flux density (PPFD) value of 150 mol/m2s, which can meet the lighting demand of cannabis seedling period within this radius.
We used a medium-size pot with a square cut in the growing season. The pot size was 11 inches (27.94 cm). During the growing season, ECO Farm LED 120 W of marijuana can cover an area of four square feet, or four plants. The appropriate light intensity for adult cannabis was 800±200 mol/m2s. Using the ECO Farm LED 120 W marijuana grow lights in the growing area, the top of the cannabis leaf is approximately 43 inches (109.22 cm) from the lamp. As shown in the figure below.
For large areas where marijuana is growing and flowering, the LED lights require one light for every 4 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/m2·s. As shown in the figure below.
From the above data, although the intensity of this light is high, the ability to gather light is too strong, so the coverage area is not particularly large, so if you are a large planting area, you need to arrange a lot of these lights.
So I suggest, when large area planting, the best with an HPS high-pressure sodium lamp or CMH gold halide lamp so can make up for this defect. As for how to prepare and arrange such a hybrid light source, you can contact Mary, director of product sales at ECO FARM GREEN INC., whose engineers will help you design a hybrid light source solution for marijuana cultivation for free.
Let's first look at the situation of the light bead. From the details of the lamp bead, we can see that this light bead is the OSRAM brand in Germany. This kind of light bead is the main application in the plant light industry at present. It has a high photosynthetic quantum number efficiency and is a light bead that saves electricity.
Finally, let's take a look at the heat dissipation of this light. The heat dissipation of this light is made of aluminum alloy profile. The aluminum substrate is very thick with large heat capacity.
Judge from a few details above, this light has great quality. 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 light 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 387.6 W with instructions for the 400 W is similar, instantaneous power near the average power fluctuation is a normal phenomenon.
As can be seen from the picture, we have lit the light for 3.93 hours, namely 236 minutes. The actual electricity consumption is only 1.52kwh, while that for 24 hours is 1440 minutes. Thus, the 24-hour electricity consumption in a day is about 1.52*1440/236=9.29kwh.
At $0.125 per kilowatt of electricity in the United States today, for $1.16 a day you could cover a growing or flowering marijuana area of 4.0 square feet.1 square foot (sq.ft)=0.092903 SQM (SQM), which is the area that can cover 0.37 SQM.
Personally, I think this light is especially suitable for small tent planting. One light is enough for one tent. Mary, director of product sales at ECO FARM GREEN INC., told me that the lights are used in one of their small tent sets. You can go to their official website ecofarm.ca to buy, will be cheaper.
(1)sufficient light intensity.
(2)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.
(1)this light is only coated with waterproof paint, and the electric fan is used for heat dissipation, so it is basically not waterproof. If you use spray irrigation, you can't use this light.
(2)this light uses a fan to dissipate heat, so it is also not insect-proof. If you plant in a closed space, there are all kinds of mosquitoes and moths, it is easy to be sucked into the light, which will affect the heat dissipation for a long time.
(3)this light has a very strong light gathering ability and small irradiation area. If you are planting in a large area, it is better to cooperate with an HPS high-pressure sodium lamp or CMH gold halide lamp to make up for this defect.
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 marijuana 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.