Download as pdf: Press Release: Valoya Lights at Korkeasaari Zoo

PRESS RELEASE 15-11-2012

Plants, animals and humans enjoy Valoya white grow LED lights at Helsinki Zoo. Valoya Ltd. provides lighting for the Helsinki Zoo, Finland. The Zoo selected Valoya’s LED lights because of their unique white plant spectrum, which enables illumination for plants, animals and humans in the Africa-Asia house.

In addition to being the home of various animals, the Helsinki Zoo also hosts hundreds of different plant species. Therefore, the Zoo pays great attention to the optimal lighting of their interior areas where animals and plants coexist. Until now the Zoo has used traditional high pressure sodium (HPS) lamps, but as these did not provide sufficient light for the plants, the Helsinki Zoo decided to look for other lighting options for its Africa - Asia House. The Valoya LED grow lights were selected due to their unique light spectra that have been optimized for plants.


Timo Paasikunnas, Head Keeper of Reptiles, Amphibians and Invertebrates at Helsinki Zoo comments: “The LED lights have brought natural colors of the plants visible during the times when artificial light is used. Lightning also enables us to widen the plant selection away from shade plants towards sun plants and we can have flowering plants, even on the “forest floor”.  

What makes the employed Valoya ARCH spectrum especially unique is its light: the light is perceived as white by the human and animal eyes, but at the same time it contains all the information plants need for growing and prospering. Consequently, Valoya’s LED lights enhance plant growth and are pleasant for the animal and human eye as well. Therefore Valoya’s lights can be placed into spaces where plants coexist with humans and animals.  

In addition to the superior spectrum, the Helsinki Zoo chose Valoya’s grow lights because the LED’s provide extensive energy savings and the robust fixtures warrant a long lifespan for the luminaires.

The use of Valoya’s full spectrum LED lights improves the quality of plants. Begonias grown under Valoya LED lights achieved better color intensity and enhanced flowering compared to the plants grown under traditional artificial lighting.

Valoya studied the effects of LED lighting and High Pressure Sodium (HPS) lighting on the growth of Begonia flowers. Begonias cultivated in greenhouses under traditional HPS lighting, have shown decrease of flower quality in the winter months when HPS lights are the dominant source of light. The decreased quality can be seen as pale color of flowers and uneven quality of the crop.

To test potential benefits compared to HPS lights, Valoya cultivated four varieties of Begonias: Blitz, Carneval, Rebecca and Reina. The research was conducted in conditions similar to commercial growers’ greenhouse settings.

The results of the demonstration showed that the wide spectrum of the Valoya LED lights provides improvement compared to HPS light. The improvement was seen in several ways; the plants grown under Valoya LED’s had up to 21% more flowering stems and up to 23% more buds in comparison with the HPS plants. In addition, the color intensity of the flowers and leaves was significantly stronger on the LED plants. The Begonias grown under Valoya’s full spectrum were compact and symmetrical, which contributed to a healthy and beautiful plant.  

Similar results have also been seen with tulips, roses, saintpaulia, chrysanthemum and several other plant species. 

The plants grown under Valoya’s AP67 LED -lights (left) produced stronger colors and a more compact and symmetrical plant, in comparison with HPS plants (right).