Rotterdam Zoo is a major tourist attraction with 1.5 million visitors per year. Inherent to the needs of a zoo, energy consumption is relatively high: 8.4 million kWh and 1.2 million m3 gas annually. For years now, the Zoo has worked towards reducing its energy consumption and raising awareness on energy use amongst visitors.
One of the very specific characteristic of this pilot is that the LED lighting system was installed above algae growth tanks and aquarium tanks. Scientific studies show that the light spectrum of LEDs can actually improve the growth of some coral species. The most important requirement in this area is that life support requirements are met. The choice of fittings are determined by the appropriate spectral distribution and light flux output. In the case of the aquarium tanks, the lighting system also simulates daylight filtering through the water as seen from the public viewing corridors below. For this reason, higher colour temperature fittings will be preferred as they are closer to daylight colour.
Besides the general lighting conditions improvements, the results obtained in terms of energy consumption are really good, taking into account that the lighting system of the Rotterdam zoo was already quite efficient. Actually the Light on Demand system (with motion sensors) in the circulation areas and technical rooms is a real energy saver as in this area the light cannot be totally switched off for security reason. So the lights are dimmed when no one is there and as soon as a presence is detected, the light is switched on to its maximum. The graph below illustrates the savings made thanks to this system.