Why Koray recommend LED grow lights with lens concentrators
Let’s start with the conclusion:
In most application scenarios, LED plant lights with condenser lenses have better actual cultivation effects than plant lights without condenser lenses.
Because it has higher PPFD, and stronger photon penetration.
Although the plant grow lights without lens has higher luminous efficiency.
We know that the core illuminance of plant lighting is the photosynthetic photon flux density PPFD, not the efficiency PPE of the grow lights.
No matter how high the efficiency PPE, if it cannot be converted into the illuminance PPFD of the plant canopy, it is invalid. For example, when the light shines on the corridor , is wasted.
Let’s look at the test data. The picture below is a comparison test of G45 plant grow light with lens reflector and ordinary T8 lamp (T8 lamp does not use condenser lens)
At a distance of 0.3m from the plant canopy and a coverage of 0.45×1.2m, the power difference between the two lamps is 3.4 times.
The above examples may be very special, they are not the same type of lamps, below we use the same lamps for comparison.
Same luminaire, PPFD tested with and without lens
0.2m and 0.3m suspension height test, which is also the most commonly used suspension height and coverage area.
Average PPFD was 25-35% higher with lenses than without lenses.
Growing plants in small areas, using spotlights with lenses, has a higher average PPFD and is therefore more effective.
Photons irradiating beyond the plant canopy are ineffective light.
The above is a small area of plant cultivation, and the LED plant light of the condenser lens has obvious advantages. What about large-scale cultivation?
0.2m height test, the average PPFD difference is 18%
The above is the test data of the same model and the same power, and the photosynthetic photon flux PPF without lens is even higher than that of the product with lens.
However, in the actual test, the light value PPFD reaching the plant canopy is lower than that of the product with lens.
0.3m height test, PPFD difference is 20%
Based on the test data of 0.2m and 0.3m, the product with lens has stronger light penetration, improves the photosynthesis of the lower leaves, and can make the whole plant have more photosynthetic photons.
According to the application scenarios of plant light lighting, LED plant lights with the same power and efficiency can improve the PPFD of the plant canopy in most cases by using a condenser lens.
It is recommended to use lens grow lights when the distance between the lamps and the plant canopy is more than 0.2m.
The fewer lamps there are, the more effective the use of lenses will be.
For large-scale cultivation of plants, the use of lens products still has certain advantages in the irradiation distance of more than 0.15m.
The best way is to choose different lighting angles according to different scenes. To achieve the maximum application of light. That is, directional irradiation, the utilization rate of light is high.
Koray plant grow lights, with multiple angles to choose from, adapt to different lighting hanging heights
Plant grow lights with the same power consumption,
The more average PPFD output to the plant canopy, the better the grow light.