Lighting

 
Dennerle aquarium lighting boasts three special features:
  • especially long-lasting due to modern (Trocal Longlife-technology)
  • brilliant colour rendering due to 3-band technology
  • Filtering of unwanted UV light by UV protection film
spectrum of possibilities

The optimum lighting for an aquarium must fulfil two requirements: A pleasant light output which allows the aquarium to shine in all its splendour and at the same time supports photosynthesis, the prerequisite for any plant growth.

But how can you create the optimum lighting conditions for your plants without encouraging unnecessary algae growth?

Dennerle has looked to nature again for this. The solution to supply an aquarium with appropriate light lies in the spectrum of colours.

In order to develop strongly, aquarium plants need lots of light from the red end of the spectrum, with only a little blue, and no or very little UV radiation. In contrast, algae especially thrive in blue light and with a high UV component. Throughout their entire evolution, algae have always lived in water and they have mainly been exposed to strong, direct sunlight and UV light.
In contrast, most aquarium plants originate from tropical forests. They have adapted to the lighting conditions in the shade of dense trees. Here, the UV light and light in the blue spectrum is naturally filtered.

 

The secret of the special moment

Daylight, the full spectrum of visible light, is ever present and familiar to us all. It is nothing special for us, we do not pay any attention to it. But moments with special light stay in our memories for a long time. These include sunrises and sunsets, a late afternoon in an Indian summer, and the like. In all of these cases, the light is not the full daylight spectrum – it is filtered. We only see a portion of the light, some areas of the spectrum are not visible. This is why Dennerle chooses light bulbs with 3-band technology, the light from which has a somewhat more otherworldly and brilliant effect in comparison with "full spectrum" bulbs. Trocal light bulbs are rated "very good" on the colour rendering index.

The Dennerle tubes are also covered with an additional UV protective film. The 3-band tubes with UV stop and Trocal-Longlife Technology provide many advantages:

  • no UV light (the spectrum is cut off below 400 nm)
  • increased luminous efficiency (lumen value)
  • low loss of light intensity over the course of the lifespan.

Due to the low loss of light intensity Trocal light tubes do not have to be changed after a year (approx. 4,000 operating hours).

 
The famous midday break:

In the tropical home of most aquarium plants the sky is repeatedly darkened by thunderstorms. For this reason it is advisable to give plants a break and turn the lighting off for between two and four hours around midday. Daylight from the window will be sufficient for your plants during this time. Desirable side-effect: This makes life hard for algae.

Example:
9:00 am until 2:00 pm, 1st light period, 5 hrs.
2:00 pm until 5:00 pm, midday break, 3 hrs.
5:00 pm until 10:00 pm, 2nd light period, 5 hrs.

 
Shelf life:

Dennerle puts great emphasis on its products having an above-average lifespan, which saves financial and ecological resources in the long-term.

Trocal fluorescent tubes have an economical lifespan of 10,000 to 15,000 operating hours, this equates to a lifespan of up to 3 years. As a results, it is not necessary to change them after only 12 months.