With more than 600 sports halls for 1.9 million inhabitants Hamburg can justifiably call itself a sporty city. Lighting in these gyms must be replaced on a regular basis. ETAP installed E7 LED luminaires in four school gyms. Result: comfortable lighting, flexibility and impressive energy saving.
With targeted, energy-saving modernisation measures, SBH | Schulbau Hamburg aims to lower the energy bill in Hamburg schools and sports halls. Lighting obviously plays an important role in this context. ETAP's E7 luminaires were chosen for the relighting of the G9 automotive engineering school. E7 uses LED+LENS technology: high-power LEDs with individual lenses that blend lighting comfort with sophisticated light distribution. Rough handling Lighting in a gym must be able to handle some rough handling, which is why the luminaires are subjected to a ball test consisting of a ball being thrown against the luminaire 36 times, from three different angles and at a speed of 60 km/hour. After this salvo the luminaire should not display damage that could jeopardise electrical safety. The E7 luminaires came through with flying colours and therefore satisfy the DIN VDE 0710-13 standard. Flexibility The sports halls are used by students during school hours. In the evening and during weekends they are used by neighbourhood sports clubs. "Depending on the activity, different levels of illuminance are required," according to Stephan Börger, Area-Sales-Coordinator at ETAP. "Since the luminaires are controlled by DALI (Digital Addressable Lighting Interface) we were able to offer the requested flexibility. For school sports we provide an illuminance of 300 lux. Clubs need 500 lux illuminance during training and official competitions require 750 lux." ETAP provided the scenarios, enabling the sportsmen and women to choose the correct illuminance with the press of a button. Light control results in further energy-savings and user comfort: ELS sensors dim the lights at times of sufficient daylight. Motion sensors switch the light off when no one is around Impressive saving In addition to comfort and flexibility, ETAP was primarily convincing with the savings potential of its lighting solution. For the G9 school it represents no less than 63%, thanks to the energy-efficiency of the E7 luminaires and the long service life of the LEDs, which make lamp replacement redundant. Similar savings are expected for the other sports halls.
|Old lighting||Relighting with E7|
|Number of luminaires||90||63|
|Installed power||19.080 W||11.781 W|
|Lamps' service life||16.000 h||50.000 h|
|Annual power consumption||66.780 kWh||24.740 kWh|
|Annual energy cost||14.553 euro||5.354 euro|
|Annual saving||63,1 percent|
|Annual CO2-saving||25,4 tons|