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 center line parallel to the long side of the rectangle is the X-axis, and the center line parallel to the short side of the rectangle is the Y-axis.
We take two measurements, 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 cannabis growing light under the brand Fluence, which is very well known in the cannabis growing light industry. You can refer to it.
As you could see this lamp is full spectrum, and provides a very good red yellow band, can well meet the requirements of our plant, but the part in blue is a bit poor, you should know, CMH is not the same as the LED, its spectrum is not can adjust, CMH 830 and 942 two spectra, CMH830 is such a spectrum, which is the defect of CMH lamps, we at the time of planting, according to the different stages of growth, it is best to add a can provide blue leds to make up for it.
2.1. 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 relatively tedious, the position and height are constantly changed. 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 simple calculation method for the area covered by a cannabis planting lamp is to hang the lamp to a certain height to ensure the central photosynthetic effective light quantum flux density (PPFD) value is 200 μmol / m ^ 2 / s, and then find the effective photosynthetic efficiency The light quantum flux density (PPFD) value is 150 μmol / m ^ 2 / s, the distance from the boundary to the center point. Within this radius, it can meet the lighting requirements of the cannabis seedling stage.
The other is to hang the lamp to a certain height to ensure the photosynthetic effective light quantum flux density (PPFD) value of the center point is 800 μmol / m ^ 2 / s, and find the photosynthetic effective light quantum flux density (PPFD) value of 600 μmol / m ^ 2 s The distance from the boundary to the center point, within this radius, can meet the lighting requirements of the cannabis growing period and flowering period.
Let's look at the effective exposure data of this light in this way.
2.2. How much area can this marijuana planting lamp cover if used for marijuana seedlings?
The appropriate illumination intensity of cannabis 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). On the other hand, ECO FARM 150W CMH grow lights can cover an area of 4.00 square feet (0.37 square meters), or 144 plants.
According to the measurement data, using the ECO Farm 150W CMH indoor planting light in the seeding area, the height of the cannabis seedling top from the light is about 42 inches (106.68 cm), at this time, the maximum coverage radius is measured to be 24 inches. As shown in the figure below.
If the ECO Farm 150W CMH kits are used in a large area of plant nursery, a light can cover an area of 2.00 feet times 2.00 feet is equal to 4.00 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.
2.3. How much area can this led light cover for the growing and blooming period of cannabis?
The suitable light intensity of cannabis seedlings is 800 ± 50 μmol / m ^ 2 / s. We use small flower pots with square mouths for common cannabis seedlings. The mouth size of the pots is 11 inches (27.94cm ). In the nursery area, the ECO FARM 150W CMH GROW Kit cannabis planting lamp can cover an area of 1 square feet (0.09 square meters), which can cover 4 cannabis seedlings.
According to the measurement datas, using ECO Farm 150W grow light in the growing area, the height of the cannabis seedling top from the light is about 20.00 inches (50.80 cm). At this time, the maximum coverage radius is 12.00 inches. As shown below.
For large growing areas where marijuana is growing and flowering, the LED lights require one light for every 1.00 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: 600μmol/m^2 s. As shown in the figure below.
From the above data, this lamp is still very good, but relatively speaking, the blue part of the spectrum is less.
Therefore, I suggest that this lamp should be used in conjunction with the LED lamp, which can provide a good spectrum. With a few CMH of this kind of small power, the cost can be greatly reduced.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 marijuana plants for free.
Let's take a look at the light beads, and the inside of the light bulb is a bubble of glass, and this is the CMH light bulb, just to give you a sense of the fact that with current technology, the light efficiency of CMH is about 110 lm/W, and the quantum flux efficiency of converted photosynthetic light is about 1.8umol/s/W.
Finally, we have a look at the structure of this lamp, it has a bowl-shaped reflective cover to focus the light together, reflective cover center has two clips to fix the bulb, a little push and pull to install and remove the bulb, very convenient, at the same time on the top of the power supply, the lamp is very compact.
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 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 lamp is really save electricity, first of all, we look at its instantaneous power, the display is 164.8 w, this is the power of the input power, and the output is 150 w, you can see the power source efficiency is very high.
From the picture, we can see that we lighted this lamp for 217 minutes in total. The actual power consumption is only 0.56 kwh, and 24 hours is 1440 minutes. In this way, the power consumption for 24 hours a day is about 0.56 * 1440/233 = 3.72 kwh.
At $0.125 a kilowatt-hour, you could cover 2.01 square feet of marijuana growing space for $0.465 a day.1 square foot (sq.ft)=0.092903 square meters (sq.m), which is the area that can cover 0.19 square meters.
If you cover growing and flowering areas, you can cover 1 square feet.1 square foot (sq.ft)=0.092903 SQM (SQM), which is the area that can cover 0.09 SQM.
If your room is 5 meters wide and 6 meters long and 30 square meters (323sq.ft), remove the non-growing area in the space, and the growing area is about 20 square meters, then 175 of these lights will be enough. The lighting time for marijuana growth is usually only 16 hours per day, so the real daily electricity cost should be 54.17USD.
(1) good spectrum, CMH is also very suitable for growing marijuana.
(2) the illumination area is relatively large, which can be regarded as a relatively large area in the 150-watt hemp planting lamp.
(3) the price is really cheap. You can hardly find a cheaper 150-watt CMH planting lamp on the market
At this point, we have completely evaluated this lamp. If you are interested in this lamp or other products, you can contact Mary, product sales director of ECO FARM GREEN INC. Her contact information is: her email address is firstname.lastname@example.org, WhatsApp is +86 13155136939, or directly through the sales link of the following products.
Finally, I am very happy to share with you all kinds of interesting things about marijuana. Please also help me to like, share, and comment on this review so that more people can see it and let us have greater influence.