Official: How to implement human centric lighting

THE FIRST official recommended practice for implementing so-called human-centric lighting has been unveiled by a top industry scientist.

Scientist Mark Rea stunned a conference in Oslo by revealing a specific recipe that the industry could use to begin installing human-centric lighting. He described it as ‘putting a stake in the ground’. Pic: LR

Mark Rea, professor of architecture and cognitive sciences at the Lighting Research Center (LRC) at Rensselaer Polytechnic Institute in New York, told a conference in Oslo that the LRC's specific recipe would allow the industry to begin installing human-centric lighting in workplaces, schools and other facilities.

The adoption of human-centric lighting – which, say proponents, sets occupants sleep-wake cycles and provides benefits such as better productivity, alertness and sleep – has been stalled by an absence of independent and authoritative guidance on its specific implementation.

Although human-centric lighting metrics have been cited in some standards, including the German DIN specification and the Well 2 wellbeing guidelines, the publication of the ‘recommended practice’ has the potential to move human-centric lighting from the fringe to the mainstream and give the industry a powerful and profitable narrative as LED adoption passes its peak.

In essence, Rea is specifying that occupants receive 254 lux of vertical illumination at the eye for at least two hours, ideally in the morning. It described the recommendation as a ‘stake in the ground’.

‘We believe we’re ready to go,’ said Rea. 'We don't know everything and the science is never complete…but science can clearly differentiate between big issues and small issues, and I think people forget that.

‘Sometimes they think the science is not complete, but we can tell the difference between an elephant and a mouse, I mean, we may not understand everything but at least we can tell the difference between that.

‘So a good recommended practice must include the science and its uncertainties, and our recommended practice has bent over backwards to say what we know.’

The 254 lux is based on a criterion that it will suppress the sleep hormone melatonin by 30 per cent. Lux is used, says Rea, because that’s a measure that the industry understands.

The specific spectrum of the light is not specified because the recommendation is not a replacement of circadian-effective light index or anything else. ‘This is just what you need for biological effectiveness. The SCN (suprachiasmatic nucleus region of the brain) doesn’t care about colour rendering, it just doesn't care. Your visual system cares a lot but the circadian system doesn’t'.

‘Now, do you really think three significant figures can be justified in terms of the science?  No. But you have to engineer something. So that’s our target. 250 lux of daylight for at least two hours, and ideally we believe in the morning. That’s what we’re going to declare, put a stake in the ground, that’s what we’re going to engineer.’

Rea emphasised that it was up to engineers and lighting professionals to design the physical lighting that would deliver the recommended practice in the real world.

‘The key question for a recommended practice is: how am I going to engineer this stuff?  I’ve got to take these qualitative bright lights during the day, dim lights during the day, but what do you mean by bright and what do you mean by dim, how do I know that, how do I engineer it in a way that I’m going to give reliable differences.

‘You want to go to a customer, pick a big one, Volvo, say…and you say, “I’m going to give you a lighting system, and if you follow these engineering principles we’re going to give a sample of 20 of your workers and I’m telling you they're going to sleep better than they did before.” That’s sticking your neck out, isn't it?  But isn’t that our obligation?  Isn’t it, fundamentally?

The metric can be adjusted for various luminaire formats and colour temperatures, where 1 is the base of 254 vertical photopic lux measured at the eye.

'This isn’t everything for a lighting designer. [The lighting installation] still has got to not cause glare; you've still got to be able to see; it’s still got to be cost effective. This is one design element; this is not everything you ever need to know about lighting design.’

Rea told the conference – hosted by leading human-centric lighting manufacturer Glamox Lighting – that the recommendation was not a permanent solution. ‘This is something that is our best guess right now and it will evolve.

‘We’re not forcing anybody to do anything. We’re just saying if I want to do [human-centric lighting], this is what I need.

‘And there are many ways to get there, so we’re not trying to tell you that you have to do it from the ceiling or from a table top or anything else, or even go outside for two hours, which apparently works pretty well.

‘If that’s the work environment that works best for your client, do it. Don't force them into some solution because you happen to have it in the warehouse and you want to sell it. I think that’s a bad idea.

‘But there are no guarantees here. You don't have to do this if you don't want to. If you do, this is the number.’

The recommended will be shared for public review in December with an anticipated official publication in the spring of 2019.

 

  • Human-centric lighting is the key theme of the Lighting for Workplace and Wellbeing conference track at LuxLive 2018. Speakers include human-centric lighting experts Dr Octavio Perez of Mount Sinai Hospital and Luke Price of Public Health England. See the full programme HERE. LuxLive 2018 takes place on Wednesday 14 November and Thursday 15 November 2018. To register for free, click HERE.

 

 

 

Comments 38

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Hello my name is Kallya from USA i want to tell the world about the great and mighty spell caster called Priest Ade my husband was cheating on me and no longer committed to me and our kids when i asked him what the problem was he told me he has fell out of love for me and wanted a divorce i was so heart broken i cried all day and night but he left home i was looking for something online when i saw an article how the great and powerful Priest Ade have helped so many in similar situation like mine he email address was there so i sent him an email telling him about my problem he told me he shall return back to me within 24hrs i did everything he asked me to do the nest day to my greatest surprise my husband came back home and was crying and begging for me to forgive and accept him back he can also help you contact ancientspiritspellcast@yahoo.com or ancientspiritspellcast@gmail.com https://ancientspiritspellcast12.wordpress.com Blog: https://ancientspirit1.blogspot.com Website http://ancientspiritspellcast.website2.me WhatsApp +2347059715465

Hello my name is Kallya from USA i want to tell the world about the great and mighty spell caster called Priest Ade my husband was cheating on me and no longer committed to me and our kids when i asked him what the problem was he told me he has fell out of love for me and wanted a divorce i was so heart broken i cried all day and night but he left home i was looking for something online when i saw an article how the great and powerful Priest Ade have helped so many in similar situation like mine he email address was there so i sent him an email telling him about my problem he told me he shall return back to me within 24hrs i did everything he asked me to do the nest day to my greatest surprise my husband came back home and was crying and begging for me to forgive and accept him back he can also help you contact ancientspiritspellcast@yahoo.com or ancientspiritspellcast@gmail.com https://ancientspiritspellcast12.wordpress.com Blog: https://ancientspirit1.blogspot.com Website http://ancientspiritspellcast.website2.me WhatsApp +2347059715465

heal from broken heart" Love spell from dr.Unity brought my husband back" I'm so excited my husband is back after he left me for another woman" After 12years of marriage, me and my husband has been into one quarrel or the other until he finally left me and moved to California to be with another woman. I felt my life was over and my kids thought they would never see their father again. i tried to be strong just for the kids but i could not control the pains that torments my heart, my heart was filled with sorrows and pains because i was really in love with my husband. Every day and night i think of him and always wish he could come back to me, I was really worried and i needed help, so i searched for help online and I came across a website that suggested that Dr Unity can help get ex back fast. So, I felt I should give him a try. I contacted him and he told me what to do and i did it then he did a Love spell for me. 11hours later, my husband really called me and told me that he miss me and the kids so much, So Amazing!! So that was how he came back that same day,with lots of love and joy,and he apologized for his mistake,and for the pain he caused me and the kids. Then from that day,our Marriage was now stronger than how it were before, All thanks to Dr Unity. he is so powerful and i decided to share my story on the internet that Dr.Unity is real spell caster who i will always pray to live long to help his children in the time of trouble, if you are here and you need your ex lover back or save your marriage fast. Do not cry anymore, contact Dr.Unity now. Here’s his contact,Email him at: Unityspelltemple@gmail.com or Call/WhatsApp him: +2348055361568 ,website:https://unityspelltemples.blogspot.com ,your kindness will never be forgotten. Natasha Wanderly form USA.

heal from broken heart" Love spell from dr.Unity brought my husband back" I'm so excited my husband is back after he left me for another woman" After 12years of marriage, me and my husband has been into one quarrel or the other until he finally left me and moved to California to be with another woman. I felt my life was over and my kids thought they would never see their father again. i tried to be strong just for the kids but i could not control the pains that torments my heart, my heart was filled with sorrows and pains because i was really in love with my husband. Every day and night i think of him and always wish he could come back to me, I was really worried and i needed help, so i searched for help online and I came across a website that suggested that Dr Unity can help get ex back fast. So, I felt I should give him a try. I contacted him and he told me what to do and i did it then he did a Love spell for me. 11hours later, my husband really called me and told me that he miss me and the kids so much, So Amazing!! So that was how he came back that same day,with lots of love and joy,and he apologized for his mistake,and for the pain he caused me and the kids. Then from that day,our Marriage was now stronger than how it were before, All thanks to Dr Unity. he is so powerful and i decided to share my story on the internet that Dr.Unity is real spell caster who i will always pray to live long to help his children in the time of trouble, if you are here and you need your ex lover back or save your marriage fast. Do not cry anymore, contact Dr.Unity now. Here’s his contact,Email him at: Unityspelltemple@gmail.com or Call/WhatsApp him: +2348055361568 ,website:https://unityspelltemples.blogspot.com ,your kindness will never be forgotten. Natasha Wanderly form USA.

Get Your Wife Back, Perfect Urgent Love Spell. Am Karen Renee from FL Usa All Thanks To Dr Osasu Who Brought Back The Love Of My Life. my girlfriend cheated on me and asked for a breakup. I don't believe at first i try to get back with her but all she told me was she’s with someone else. that she is no longer interested in marrying me at that point i was heart broken because i love my girlfriend so much that i could not let go off her all of a sudden she left me, i really love her and never can imagine my life without her. not until i came across a powerful real spell caster Dr Osasu who promise me 24hours urgent love spell to get back with my girlfriend, good twenty-four {24} hours. hmm-mm, it was a good night time at 11:pm within the days that Dr Osasu told me that my girlfriend will be back, at first i heard the bell rings getting close to my door i heard someone saying honey!!!, it sound familiar i opened the door and i saw my girlfriend standing and weeping in front of me. i was not surprised because its all i have been praying for her to come back home. Guess what 2 weeks after she noticed her system and her body temperature was changed and i took her to clinic for check up and the doctor told me that there is life in her which means she was pregnant i really wants to use this opportunity to thanks Dr Osasu so much and the love page that directed me to Dr Osasu if you have any problem getting your ex back, or predicament that is worse or exactly like this you have been into, contact Dr Osasu on drosasu25@gmail.com You can add him up on Whats-app/ Or call +2347064365391

Get Your Wife Back, Perfect Urgent Love Spell. Am Karen Renee from FL Usa All Thanks To Dr Osasu Who Brought Back The Love Of My Life. my girlfriend cheated on me and asked for a breakup. I don't believe at first i try to get back with her but all she told me was she’s with someone else. that she is no longer interested in marrying me at that point i was heart broken because i love my girlfriend so much that i could not let go off her all of a sudden she left me, i really love her and never can imagine my life without her. not until i came across a powerful real spell caster Dr Osasu who promise me 24hours urgent love spell to get back with my girlfriend, good twenty-four {24} hours. hmm-mm, it was a good night time at 11:pm within the days that Dr Osasu told me that my girlfriend will be back, at first i heard the bell rings getting close to my door i heard someone saying honey!!!, it sound familiar i opened the door and i saw my girlfriend standing and weeping in front of me. i was not surprised because its all i have been praying for her to come back home. Guess what 2 weeks after she noticed her system and her body temperature was changed and i took her to clinic for check up and the doctor told me that there is life in her which means she was pregnant i really wants to use this opportunity to thanks Dr Osasu so much and the love page that directed me to Dr Osasu if you have any problem getting your ex back, or predicament that is worse or exactly like this you have been into, contact Dr Osasu on drosasu25@gmail.com You can add him up on Whats-app/ Or call +2347064365391

Get Your Wife Back, Perfect Urgent Love Spell. Am Karen Renee from FL Usa All Thanks To Dr Osasu Who Brought Back The Love Of My Life. my girlfriend cheated on me and asked for a breakup. I don't believe at first i try to get back with her but all she told me was she’s with someone else. that she is no longer interested in marrying me at that point i was heart broken because i love my girlfriend so much that i could not let go off her all of a sudden she left me, i really love her and never can imagine my life without her. not until i came across a powerful real spell caster Dr Osasu who promise me 24hours urgent love spell to get back with my girlfriend, good twenty-four {24} hours. hmm-mm, it was a good night time at 11:pm within the days that Dr Osasu told me that my girlfriend will be back, at first i heard the bell rings getting close to my door i heard someone saying honey!!!, it sound familiar i opened the door and i saw my girlfriend standing and weeping in front of me. i was not surprised because its all i have been praying for her to come back home. Guess what 2 weeks after she noticed her system and her body temperature was changed and i took her to clinic for check up and the doctor told me that there is life in her which means she was pregnant i really wants to use this opportunity to thanks Dr Osasu so much and the love page that directed me to Dr Osasu if you have any problem getting your ex back, or predicament that is worse or exactly like this you have been into, contact Dr Osasu on drosasu25@gmail.com You can add him up on Whats-app/ Or call +2347064365391

Get Your Wife Back, Perfect Urgent Love Spell. Am Alexis scorpio from FL Usa All Thanks To Dr happy Who Brought Back The Love Of My Life. my girlfriend cheated on me and asked for a breakup. I don't believe at first i try to get back with her but all she told me was she’s with someone else. that she is no longer interested in marrying me at that point i was heart broken coz i love my girlfriend so much that i could not let go off her all of a sudden she left me, i really love her and never can imagine my life without her. not until i came across a powerful real spell caster Dr happy who promise me 24hours urgent love spell to get back with my girlfriend, good twenty-four {24} hours. hmm-mm, it was a good night time at 11:pm within the days that Dr happy told me that my girlfriend will be back, at first i heard the bell rings getting close to my door i heard someone saying honey!!!, it sound familiar i opened the door and i saw my girlfriend standing and weeping in front of me. i was not surprised because its all i have been praying for her to come back home. Guess what 2 weeks after she noticed her system and her body temperature was changed and i took her to clinic for check up and the doctor told me that there is life in her which means she was pregnant i really wants to use this opportunity to thanks Dr happy so much and the love page that directed me to Dr happy if you have any problem getting your ex back, or predicament that is worse or exactly like this you have been into, contact Dr happy on happylovespell2@gmail.com Whatsapp/cal +2348133873774 visit his website...happylovespell2.webnode.com/ about his love spell Blogs site.http://happylovespel.blogspot.com.ng/

Henderson Elizabeth Dr joy is a trust worthy spell caster and he will be of great help to you. I never believed in spell casting but After 4 years of marriage my husband left me because I lost my womb, and i was unable to give birth to children. I felt like my life has come to an end, and i almost committed suicide, i was emotionally down for a very long time, but thanks to this spell caster called Dr joy whom i met online after my friend Becky Ross told me how he also helped her to bring back her husband in less than 2 days. I believed her and decided to give Dr joy a try and i contacted him on his email joylovespell@gmail.com. and explained my problems to him. He laughed and told me that In less than 2 days, my Husband will come back to me again, and that he will restore my womb and i will give birth to children. At first i thought it was a joke but i took courage and believed as Dr joy has said and it did happen just as this Great spell caster said, My husband called me and was crying, begging for forgiveness. I forgive him and today i am so glad that all worries and problems has gone away, and we are even happier than before, another good news is that i am pregnant now, and very soon we will have our baby. Dr joy is really a gifted and a powerful spiritual man and i will not stop publishing him because he is a wonderful man. I advice you all If you have a problem and you are looking for a real and genuine spell caster to solve all your problems just Contact Dr joy on his email on joylovespell@gmail.com. because he will always help you to solve all problems. Once again thank you Dr joy. Thank you, thank you. you can also call him or add him on Whats-app: +233572337390..

heal from broken heart" I'm so excited my husband is back after he left me for another woman"contact Unityspelltemple@gmail.com to help you get your Ex lover back urgently after breakup/divorce" After 12years of marriage, me and my husband has been into one quarrel or the other until he finally left me and moved to California to be with another woman. I felt my life was over and my kids thought they would never see their father again. i tried to be strong just for the kids but i could not control the pains that torments my heart, my heart was filled with sorrows and pains because i was really in love with my husband. Every day and night i think of him and always wish he could come back to me, I was really worried and i needed help, so i searched for help online and I came across a website that suggested that Dr Unity can help get ex back fast. So, I felt I should give him a try. I contacted him and he told me what to do and i did it then he did a Love spell for me. 11hours later, my husband really called me and told me that he miss me and the kids so much, So Amazing!! So that was how he came back that same day,with lots of love and joy,and he apologized for his mistake,and for the pain he caused me and the kids. Then from that day,our Marriage was now stronger than how it were before, All thanks to Dr Unity. he is so powerful and i decided to share my story on the internet that Dr.Unity is real spell caster who i will always pray to live long to help his children in the time of trouble, if you are here and you need your ex lover back or save your marriage fast. Do not cry anymore, contact this powerful spell caster Dr.Unity now. Here’s his contact,Email him at: Unityspelltemple@gmail.com or Call/WhatsApp him: +2348055361568 ,website:https://unityspelltemples.blogspot.com ,your kindness will never be forgotten. Natasha Wanderly form USA.

heal from broken heart" I'm so excited my husband is back after he left me for another woman"contact Unityspelltemple@gmail.com to help you get your Ex lover back urgently after breakup/divorce" After 12years of marriage, me and my husband has been into one quarrel or the other until he finally left me and moved to California to be with another woman. I felt my life was over and my kids thought they would never see their father again. i tried to be strong just for the kids but i could not control the pains that torments my heart, my heart was filled with sorrows and pains because i was really in love with my husband. Every day and night i think of him and always wish he could come back to me, I was really worried and i needed help, so i searched for help online and I came across a website that suggested that Dr Unity can help get ex back fast. So, I felt I should give him a try. I contacted him and he told me what to do and i did it then he did a Love spell for me. 11hours later, my husband really called me and told me that he miss me and the kids so much, So Amazing!! So that was how he came back that same day,with lots of love and joy,and he apologized for his mistake,and for the pain he caused me and the kids. Then from that day,our Marriage was now stronger than how it were before, All thanks to Dr Unity. he is so powerful and i decided to share my story on the internet that Dr.Unity is real spell caster who i will always pray to live long to help his children in the time of trouble, if you are here and you need your ex lover back or save your marriage fast. Do not cry anymore, contact this powerful spell caster Dr.Unity now. Here’s his contact,Email him at: Unityspelltemple@gmail.com or Call/WhatsApp him: +2348055361568 ,website:https://unityspelltemples.blogspot.com ,your kindness will never be forgotten. Natasha Wanderly form USA.

Help to get your ex-lover back | Love spell casting expert? Call/WhatsApp Dr.Unity +2348055361568. I'm so excited my husband is back after he left me for another woman" After 12years of marriage, me and my husband has been into one quarrel or the other until he finally left me and moved to California to be with another woman. I felt my life was over and my kids thought they would never see their father again. i tried to be strong just for the kids but i could not control the pains that torments my heart, my heart was filled with sorrows and pains because i was really in love with my husband. Every day and night i think of him and always wish he could come back to me, I was really worried and i needed help, so i searched for help online and I came across a website that suggested that Dr Unity can help get ex back fast. So, I felt I should give him a try. I contacted him and he told me what to do and i did it then he did a Love spell for me. 11hours later, my husband really called me and told me that he miss me and the kids so much, So Amazing!! So that was how he came back that same day,with lots of love and joy,and he apologized for his mistake,and for the pain he caused me and the kids. Then from that day,our Marriage was now stronger than how it were before, All thanks to Dr Unity. he is so powerful and i decided to share my story on the internet that Dr.Unity is real spell caster who i will always pray to live long to help his children in the time of trouble, if you are here and you need your ex lover back or save your marriage fast. Do not cry anymore, contact this powerful spell caster Dr.Unity now. Here’s his contact,Email him at: Unityspelltemple@gmail.com or Call/WhatsApp him: +2348055361568 ,website:https://unityspelltemples.blogspot.com ,your kindness will never be forgotten. Natasha Wanderly form USA.

Love spell that work very fast: Check on Dr Sam website now: https://supremespellS.blogspot.com My husband broke up with me 5 months ago, and forced me to sign the divorce papers, and i was completely heartbroken. And I could not get back into any shape emotionally. I Thank God for this astonishing and brilliant spell caster that came to my rescue. Wow! This spell caster has helped me so much. Dr. Sam guaranteed me an urgent 24 hours spell casting, of which i accepted it. Shockingly! this month on the 4TH OF May 2019, my husband called me back with lots of apologies after 48 hours which he assured me, and he did everything possible to withdraw the divorce papers which was previously ongoing with the power of this miracle working spell caster. My Ex Husband came back to me and he was remorseful for the whole lot he has done And now my life is balanced and i am happy again. Thank you so so so much Lord for your powerful spells. expressions are not sufficient to say thank you. Email Dr Sam now for Urgent love spell. Supremespellcast@gmail.com Or Supremespellcast@yahoo.com WhatsApp or call him +2347087462033

I wish Mark Rea would back up his "stake in the ground" with research. What does he have and where has he done it? Who reviewed his research? So many questions and I not many answers.

It's great that the LRC are making a big noise about this; the LRC and Mark Rea are highly respected, but this is not a new "major breakthrough" as indicated in the article. DIN SPEC 5031-100 and DIN SPEC 67600 have been talking about 250EML for a good few years now and it's an often cited figure in many of the circadian lighting presentations and documents you can find online.

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