1. Functional light and what about health? Norms and measurements

2. www.olino.org Healthy light DIN SPEC 67600:2013-04 Biologically effective illumination, design guidelines DIN SPEC 5031-100:2015-08 Measurement using the eye, of the melanopic effect of light on humans: variables, formula symbols and actionspectrum

3. www.olino.org Biologically effective light can be healthy The following positive effects Stabilization of human circadian system Synchr. sleep-wake with 24 hour day-night Re-inforcement of amplitude of biol. clock Activation and improvement of concentration Facilitation and fostering of regeneration Improvement moods Strengthening immune system Note: to be applied to right time of the day!

4. www.olino.org Human circadian system Biological rhythm of about 1 day length, variations in body temperature hormone descretion rhythm of heart activity and rest Light can affect it and reset the timing of it

5. www.olino.org DIN SPEC 67600:2013-04 Observations but not further considered here Light enters human not only via eyes (skin, hair roots) Production of Vit-D done by UV-B Focus in norm on Non-visual effects of light transmitted through the eyes Design guidelines for living spaces (extended stay) Statement: bio. effective light is not related to energy efficiency of visual light  keep separate Statement: better to use melanopic effects since normal vision is not considered (in biologic effects normal vision is included).

6. www.olino.org Melanopic effectiveness Minimum 250 lux as vertical illuminance on the eye At Tc = 8000 K (at eye) of a fluorescent TL Beware of reflections and filtering! Several hours of exposure a day Preferably in the morning Solid angle of light source is important < 0.1 sr no effect (20 deg view angle) > 0.1 sr and 0.1 sr and < 0.5 sr effect increases > 0.5 sr good effect (46 deg view angle) Coming from above or upper part of visual field

7. www.olino.org Office space 1.200lx_vert@3000K 2.Dependent on visual task (EN 12464-1) (also lx_horiz) 3.250lx_vert@8000K

8. www.olino.org Classroom i 1.200lx_vert@3000K 2.Dependent on visual task (EN 12464-1). See example for school day.

9. www.olino.org Class- room ii 1.650lx_horiz@12000K (synchr biol. clock) 2.300lx_horiz@4000K (normal lesson) 3.1000lx_horiz@6000K (test/concentration work) 4.300lx@2700K (calming after test) 5.650lx@12000K (activate after lunch)

10. www.olino.org DIN SPEC 5031 -100:2015- 08 a_mel_v = melanopic factor for visual radiation A: Determine melanopic effect of light with spectrum X_ λ B: Determine visual effect of light with spectrum X_ λ Divide A/B to get a_mel_v s_mel( λ )

11. www.olino.org Example a_mel_v

12. www.olino.org

13. www.olino.org a_mel_v in practice Reference values: From 67600: 250 lux_vert for 8000K fluorescent TL a_mel_v = 0.867 From 67600: 200 lux_vert for 3000K light a_mel_v = 0.387 Given any lamp, once spectrum is determined we calculate the a_mel_v Compare to a_mel_v of 8000K Tl for which a recommendation exists, determine relation Then change 250lx_vert into lux for any lamp using relation

14. www.olino.org a_mel_v in practice ii a_mel_v_NOTEii/a_mel_v_8000KTL= 1.015/0.867=1.17 So needed 250/1.17= 214 lux_vert  simulate Dialux!

15. www.olino.org Pupil and transmission effects Correction factor based on Age: k_mel(A) k_mel(A)=k_mel,trans(A)*k_mel,pupil(A) Trans = transmission through eye medium Pupil = pupil size a_mel_v(A)=a_mel_v(32)*k_mel(A) k_trans values for 8000K TL: 1.055 (25yr), 1.000 (32yr), 0.825 (50yr), 0.569 (75yr), 0.437 (90yr)

16. www.olino.org Spectral transmission effect

17. www.olino.org Pupil effect

18. www.olino.org OliNo at LED-EXPO Take your lamp and we measure Flicker content Color spectrum with CRI and CQS Blue Light Hazard For more explanations For lamp measurement info