1. LED Street Lighting in Osnabrück Andreas Hänel Planetarium, Museum am Schölerberg, Osnabrück Marcel Haselof, Stadtwerke Osnabrück Osnabrück October 2011

2. LED lighting rapid increase of efficiency of white light LEDs long lifetime compactness dimmable/switchable sturdy more light at lower temp. low light pollution? still lower efficiency (NAV) expensive thermal management colour rendition TRIDONIC.ATCO

3. LEDs are getting more efficient, but warm < cool DOE

4. 4 Light colour, Man and Vision Protected spectral range for visual astronomy (Falchi et al. 2011) LED

5. Technical masterplan illumination

6. Richthofenweg Immelmannstraße residential area Pssssst!

7. conventional lighting compact fluorescent

8. Hess Sera 34 W 2400 lm 5600 K 80 lx (brightest part)

9. iGuzzini Delphi 39 W lm 4000 K

10. Indal Stela 21 W 91...120...240 lm 4000 K 30 lx

11. Philips City Spirit LED 29 W 1400 lm 3000 K 13 lx

12. Trilux 9354 LED 24 W 2400 lm neutral white (4000 K?) daylight white (5500 K?) 43 lx

13. Hella Eco Streetline 45 W 2900 lm 6300 K 25 lx

14. Richthofenweg Immelmannstraße

16. VAT Energies Westerkappeln Automous, photovoltaic, Savonius rotor no power lines! installation in Yorktown, IN 23 lx, 3500 K

17. 17 Spectral sensitivity Innolumis (Lemnis/Imtech)? Mixture of red (630 nm) - green (500 nm) Enschede/Hengelo

18. spectral sensitivity Innolumis (Lemnis/Imtech) solution? mixture of red (630 nm) - green (500nm) Lemnis

19. “Auto lightmeter“ Auto - car - automatic