Het spectrum van SpectroLight uitgelicht - Het LED Warenhuis
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SpectroLight's spectrum highlighted

SpectroLight's spectrum highlighted

The LED grow lights from SpectroLight have one of the most progressive designs when it comes to spectrum and price-quality ratio. In this article we will try to show the advantages and disadvantages of different spectra using examples and grow lights from Osram and Philips.

This is the most ideal and at the same time the most universal spectrum for grow lights.

If we look at the spectrum above, we can divide it into 3 different groups/bands:

  1. 340 - 470nm - Blue  This is the area where the light absorption of the chlorophyll granules for the blue light (chlorophyll b) and beta-carotene takes place. This promotes the vegetative phase of the plant and improves the color of the plant. It also promotes the production of terpenes. (kind of vegetable oil)
  2. 500-600nm - Green This bond has a positive effect on the plant's metabolism. To some extent it improves the efficiency of the other bands. As a result of the studies on the role of “green light”, we know that green light is completely absorbed by the plant. Especially in the lower part of the leaves.
  3. 640-680nm - Red It has now been proven that 660nm is the most important and most active part of the spectrum when it comes to the flowering and growth of flowers and fruits, among other things.

But what are the most optimal proportions for the flowering phase of your plant?

  1. 430-470nm - 10-15%
  2. 500-600nm - 20-25%
  3. 640-680nm - 60-70%

The spectrum of a Sodium grow light

If we compare this spectrum with the most ideal spectrum, this spectrum could not have high efficiency for photosynthesis. Since 45% of the spectrum is in the 500-600nm region and the rest is mainly in the 600-700nm region. This does not correspond to the most optimal ratio. Nothing is less true because several studies have shown that a very broad spectrum with many different bands (such as that of a Sodium lamp) has a very positive effect on the processes associated with photosynthesis.

Based on the above information, we can create the following spectrum

The ratio of this spectrum is as follows:

  • 430-480nm - 11%
  • 500-550nm -  8%
  • 550-600nm - 15%
  • 600-700nm - 61%
  • 700-750nm -  4%

The technology

In the model of SpectroLight 2 LED variants are used, namely:

  1. LEDs based on a blue diode, perfect for the area 430-600nm. The effectiveness of this diode is not high beyond 600nm due to a higher operating voltage of ~3V compared to the red diode with an operating voltage of ~2Volt. The efficiency of this diode is 2.3 - 2.6 µmol/J.
  2. LEDs based on a red diode, perfect in addition to the spectrum obtained by the blue diode and for the 620-680nm range. Due to the operating voltage of ~2V, this diode contributes significantly to the efficiency of the lamp. The efficiency of this diode is 3.2 - 3.7 µmol/J.

What makes SpectroLight special compared to other brands?

If we look at luminaires with only red and blue monochrome LEDS (LEDs with a single wavelength) the spectrum looks something like this:

This spectrum is mainly used in "old-fashioned" LED grow lights with only red and blue LEDs. Due to the complete lack of 500-550nm light and the way the light is produced, the light is not recommended. It is even harmful to the human eye.

Luminaires with only red and blue are recommended (in professional horticulture) because they have an efficiency of 2.65 μmol/J.

Due to research by the INHORT Skierniewice Institute, the efficiency is up to 20% lower when the sun, in winter, shines little. (in a greenhouse scenario) This is because these lamps do not take into account the 500-600nm area or green light. This automatically also applies to indoor growers where the sun never shines.

The spectrum of SpectroLight

The LED grow lights from SpectroLight combine the technologies of red and blue diodes in the form of COB(Chip On Board) LED system. The COBs are based on the most efficient blue crystals produced by Sannan. These have an effectiveness of 2.95 μmol /J. Thanks to the super-thin phosphor technology, this COB ultimately has an efficiency of 2.70 μmol /J with a consumption of 250 Watt.

The use of blue diodes (crystals) in the COB means that the spectrum is perfectly suited for lighting for plants. The distribution of the spectrum of the COB is almost perfect and the possibilities of the blue diode are optimally used. This is supported by 660nm red diodes.

The red diode used is a 660nm 4Watt diode based on Osram Oslon® dual technology. The red diode perfectly complements the spectrum of the COB in the range from 620nm to 680nm and has an efficiency of 3.41 μmol /J with 700mA.

Below the result of the COB technology together with the red diode

Curious about the SpectroLight range?

The LED Warenhuis is an official reseller of the SpectroLight LED grow lights and this gives you a whopping 5-year warranty on your lamp. look at it full range here .