Mars Hydro FC 4000 EVO

Mars Hydro Discount Code

Discount Code: CCFC

Mars-Hydro.com

Mars Hydro FC 4000 EVO Test Results

Usable ePPF

  • 692.4

Usable ePPE

  • 0.00
    Efficiency Rating

Power
Draw

  • 331

Cost
Efficiency

  • $0.00
    Cost Rating

Harvest
Potential

  • 0.0 - 0.0
  • 0.0 - 0.0

Power
Draw

  • 331

Harvest
Potential

  • 0.0 - 0.0
  • 0.0 - 0.0

Coverage

  • 0.0
  • 0.0

Ideal Hanging Height

  • 19
  • 48.5

Manufacturer's Data

  • Power Draw: 320w
  • PPF: 871 µmol
  • Efficiency: 2.85

Ideal Hanging Height

  • 19
  • 48.5

ePAR Map :

ePAR Test Data

Test Date: November 11, 2023
Tested By: Dr MJ Coco
Sensor: Apogee SQ-610
Spectral Range: 400-750nm
Ambient Temp: 24C (75F)
Power Draw: 331 watts
Test Area: 60 x 120cm (24" x 48")
Hanging Height: 48.5cm (19in)
Max PPFD: 1040µmol/m2
Average PPFD: 961.7µmol/m2
Low PPFD: 874µmol/m2
Light Distribution Score: A+

ePAR Test Data

Test Date: November 11, 2023
Tested By: Dr MJ Coco
Sensor: Apogee SQ-610
Spectral Range: 400-750nm
Ambient Temp: 24C (75F)
Power Draw: 331 watts
Test Area: 60 x 120cm (24" x 48")
Hanging Height: 48.5cm (19in)
Max PPFD: 1040µmol/m2
Average PPFD: 961.7µmol/m2
Low PPFD: 874µmol/m2
Light Distribution Score: A+

ePAR Map :

Your Grow Space

Optimal Light For Your Grow

  • Optimal Usable PPF: 0 µmol
  • Number of FC 4000 EVO Fixtures: 0.0
  • Total Cost for 0 Fixtures: $0.00
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Mars Hydro FC 4000 EVO Review

The FC 4000 EVO is the first LED bar array from Mars Hydro that is designed for 4’ x 2’ grow tents! A 4’ x 2’ tent is how I usually prefer to grow at home. However, there are not many good lights designed for 4’ x 2’ coverage. I suspect that a lot of growers will be interested in the new Mars Hydro FC-4000 EVO.
Like the other new “EVO” models from Mars Hydro, the FC-4000 features the state-of-the-art Samsung LM301h EVO diodes. They are among the most efficient diodes made for horticultural lighting. There are three LED bars. Each bar has 255 diodes, for a total diode count of 765. The published power draw is 320-watts. At full power, there are 2.39 diodes per watt or about 0.42 watts per diode. At that power level, the diodes will be somewhat less efficient than their published statistics. Remember that diode count matters at least as much as diode model.
The build quality of the FC-4000 EVO is great. It is one solid piece with no folding or assembly required. The three LED bars run the long way. The bars have integrated heat sinks and are securely mounted to aluminum cross bars on each end. Installation requires only unpacking, hanging, and connecting the power cord.
For our official PAR and ePAR tests, I set the Mars Hydro FC-4000 EVO in a 4’ x 2’ test area. I adjusted the hanging height until the Maximum PPFD at full power was exactly 1000 µmol/m2. The hanging height was 48.5cm (19in) above the sensor. I ran the official PAR and ePAR tests at that height.

In terms of coverage and density, the results are remarkable. The Average PPFD is 923.8 µmol/m2. The Average ePPFD is 961.7 µmol/m2. The distribution of light across the simulated canopy is nearly uniform. Even in the corners the density remains well above 800 µmol/m2.
While the coverage is incredible, the efficacy at full power is average. In the PAR range the FC-4000 EVO generates only 2.01 µmol/w. In the ePAR range, the efficacy is slightly higher, but still only 2.09 µmol/w. The main selling point of the EVO diodes is their efficacy, so I expected better results.
As I analyzed the results of the official tests, I realized that the issue is really just that there is too much power. Excessive power contributes to excellent coverage, but it hurts the efficacy. There should be no need to hang an LED bar array so high and run so much power in a 4’ x 2’ tent. At a lower power setting, the diodes will be more efficient, and I could hang the FC-4000 EVO at a lower height. This will lead to lower densities of light around the periphery. However, it is never going to be efficient to get PPFDs in the mid-800s in the corners.
As a general rule, I suggest growers look for grow lights with about 3 diodes per watt. That level of power allows the diodes to run closer to their maximum efficacy. The FC-4000 Evo has 765 diodes. 3 diodes per watt would give a maximum power level of 255-watts.
I lowered the dimmer on the FC-4000 EVO until my power meter showed a draw of 255-watts. It was about 75% on the dial. Then I lowered the hanging height until I got a maximum PPFD of 1000 µmol/m2. The new hanging height was only 27.5cm (11in). I ran a new PAR and ePAR test.

The coverage in these new tests is impressive. Granted, the edge and corner values did drop. However, the corners are still in the high 600s and the average PPFD and ePPFD are in the mid-800s. This is plenty of light to grow an excellent crop. Most impressively, the Photon Efficacy shot up. The FC-4000 EVO generated a very respectable 2.36 µmol/w in the PAR range and 2.48 µmol/w in the ePAR range.
If I had the FC-4000 EVO in my grow, I would run it like the second set of tests. The real benefit of the LED bar array style is that it distributes the light well and you can run the fixture close to the canopy. The real benefit of the Samsung LM301h EVO diodes is that they are very efficient. If you run the FC-4000 EVO at full blast, then you will not realize either of those benefits. However, you do not have to run at full blast. Dim it down to 75% and lower it to 11 inches and you will have an excellent spread of light and much more efficient grow.
In addition to the two sets of PAR and ePAR tests, I also tested the dimmer. I ran the dimmer test with the fixture at the official hanging height, 48.5cm (19in). The dimmer is quite accurate. The PPFD and ePPFD are just slightly higher than the dimming percentage at each setting.

There are two ways to control the dimmer. There is an on-board dimmer dial and the FC-4000 EVO can also be controlled wirelessly with the Mars Hydro App. Just download the app and open it while the light is on. It will discover the light and connect to it. You can then set timers and dimmer settings right in the app.
Finally, I measured the surface temperatures. Surface temperatures are not related to the amount of heat that a light will add to the space. With 320-watts of power, the FC-4000 EVO would add about 1090 BTU/hr. We want the light to give up its heat to the air so that the light itself does not run too hot. If the light itself runs too hot, then it will lose efficiency and longevity. Fortunately, the FC-4000 EVO does not run hot, even at full power. The maximum temperature that I measured on the LED bars was only 42.3C (108.1F). The Mars Hydro Driver got slightly warmer at 52.5C (126.5F).
I really like the FC-4000 EVO. It is a great new option for 4’ x 2’ grow tents. My only issue with it is that it is overpowered. Of course, the dimmer gives you the ability to correct for that. I strongly recommend running the FC-4000 EVO at less than full power. It can generate an excellent spread of dense light at 75% and only 11”. Running that close to the canopy can really help when the plants get too big. It is efficient, convenient and the light is dense.

Impartial Testing and Reviews


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