Category: Education + Resources

LRC Offers 3D Printing For Lighting Online Course

The Lighting Research Center at RPI is offering an Online Course on 3D Printing for Lighting. The Fall 2022 course will run from November 2 through December 7.

Image courtesy LRC

The Lighting Research Center at RPI is offering an Online Course on 3D Printing for Lighting. The Fall 2022 course will run from November 2 through December 7. This live, interactive course is designed for professionals from the lighting, 3D printing, additive manufacturing, and related industries to understand the possibilities of 3D printing for lighting and to learn more about each industry’s needs and capabilities. Classes will meet on five Wednesdays from 11:00 AM to 1:30 PM US Eastern Time. See the schedule, fees, and additional course description on the LRC’s website, here.

Image courtesy LRC

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Evluma CEO Interview: Streetlight Glare Whitepaper, The New RP-8, & Warming CCTs

David recently had the pleasure of interviewing Don Vendetti, CEO of Evluma. The street and area lighting company has just published a new whitepaper about glare. We also discussed the new ANSI/IES RP-8 standard, as well as the trend toward warming CCTs for streetlights.

I recently had the pleasure of interviewing Don Vendetti, CEO of Evluma. The street and area lighting company has just published a new whitepaper about glare. We also discussed the new ANSI/IES RP-8 standard, as well as the trend toward warming CCTs for streetlights.

Shiller: First, thank you, Don, for agreeing to do this interview. I’ve read the new Evluma whitepaper about Streetlight Glare. It does a great job breaking down discomfort glare versus disability glare, and many of the implications of both types. A big takeaway from this whitepaper is that a well-designed, secondary diffuser / lens can reduce both types of glare. Do a significant percentage of Evluma ROADMAX streetlight customers install the Evluma secondary diffuser optic to reduce glare? Do many install the optional light trespass shields (front-side & house-side)?

Vendetti: David, I appreciate the opportunity to discuss the concept of glare and our ROADMAX product.  Before diving into that, I’d like to give some background on Evluma.  We’ve been around for about 14 years now as a lighting company, and our founders have decades of LED design experience.

With all of our products, minimizing any possible negative user experience in the switch from HPS or MH to LED has been a key focus. There are several key differences between the technologies that can create this negative experience.  These include generally higher CCTs, discrete pixelated light sources, and a high potential for glare due to the use of primary optics.

Our main product until now has been our AREAMAX security light and it is a top competitor, particularly in the rural cooperative electric utilities.  Its design includes a diffused glass lens over a single primary optic and LED source.  This reduces the intensity of the emitted light, especially at higher angles.  While the effect helps to reduce glare, our original intention was to make luminaires that put out a “pleasing light.”

This has been a product design theme for us, including our OMNIMAX retrofit.  Our design of the ROADMAX streetlight is implemented in a similar way as AREAMAX specifically targeting glare, while also making the diffused secondary lens optional and installable at the factory, or in the field.  We did this to allow customers to decide which version is most acceptable in their roadway application. 

To date, there has been strong interest in the diffused lens and many of our sales have included it installed from the factory.  We also have a few customers who selected to install the lens in the field during trials to compare the difference.  The shields are typically purchased to address specific problem areas where light spill is an issue, so the normal scenario is a much lower quantity of shields purchased versus the luminaires. 

Shiller: In some ways, could Evluma’s globes and acorns be considered as secondary diffuser optics to assist in managing glare, for post top lights? Should specifiers think about new globes and acorns as a potential glare control measure?

Vendetti: That’s a very good observation. The OMNIMAX product has several design features itself to help mitigate glare. The first is a silicon lens over the LEDs.  This protects the LEDs from direct contact and also contains a light texture to create diffusion of the light directly from the LEDs. 

The dimensions of the lamp and location of the LEDs were intended to try to get close to the original size and burn center of the HID lamps being replaced.  This design feature leverages the existing globe and acorn optics to put light where it was intended and is particularly important for prismatic globes.  A retrofit lamp that has LEDs in vertical rows extending beyond the central prismatic elements is not going to deliver light as expected and will also look much different than the original HID inside the globe.

With any post-top retrofit project, a decision needs to be made about what to do about damaged, dirty or tired-looking fixtures.  If they are classic globe or acorn fixtures, they can be easily replaced, creating a clean new look with the retrofit lamp.  Additionally, it presents an opportunity to reduce glare versus the legacy fixture by choosing a diffused replacement.

Some of our add-on globes and acorns come in low-glare material, such as LD Acrylic.  This is a highly transmissive, translucent material that diffuses the light and provides a fixture with a soft, low-glare glow.  We have some nice photos in the Gallery section of our website to illustrate some installations. 

Shiller: Do you find Evluma’s streetlight customers to be knowledgeable about glare types and mitigation strategies? Do you see knowledge differences between municipal, utility, and other commercial streetlight customers regarding glare? 

Vendetti: We see a large spectrum of customers with vastly different levels of understanding of glare.  There are some who rely on outside resources or the luminaire vendors to help them understand it.  I suspect understanding glare is an issue in the industry as a whole, not just for our customers. 

The topic of glare is complicated and confusing due to there being multiple types of glare: Discomfort and Disability. Most complaints about glare come from the Discomfort side, typically associated with light trespass. It’s easy to grasp that a light is shining where it’s not useful and is annoying due to being overly bright.  The light is also typically static and at a fixed location, so it is easy to identify when the glare occurs.  However, there is no standard method for measuring it or predicting it with simulation software, so you’re stuck with addressing it when and where it happens. 

Disability Glare is much less intuitive and occurs in the dynamic environment of driving (as can Discomfort Glare). While it has a metric and can be predicted and assessed using simulation software, it is difficult to measure. It can also be impacted by changing conditions, such as weather, and is highly influenced by the age of the driver.  

From my own research, I have had to try to piece together a picture of glare from available publications.  Most of this information is fairly technical and quickly dives into the physiology of our eyes, light adaptation levels, contrast ratios and complicated diagrams using trigonometry.  This rarely helps those looking for a quick understanding of Glare or the causes and solutions.

For these reasons, we feel that we need to be a steward in facilitating a better understanding of glare and how to control it.  This was the main driver in the creation of our new whitepaper on glare as a step in simplifying the conversation for our customers. 

Shiller: Evluma’s website references utilities more than municipalities or commercial end users. Is Evluma primarily focused on the utility streetlight market? 

Vendetti: We have historically focused on the utility market for our AREAMAX product, so this is where our most experience is, to date.  Our OMNIMAX product appeals to many municipal and commercial customers, due to preserving the investment in often high-priced or difficult to replace decorative fixtures.  We expect ROADMAX to have appeal across all segments, including DOTs. 

Shiller: The IES recently released their updated ANSI/IES RP-8-21 Recommended Practice for Lighting Roadway and Parking Facilities. Do you see this updated roadway standard impacting the market and Evluma’s business in any way?

Vendetti: Our experience with RP-8 started in 2016 when we introduced a Type III distribution on AREAMAX, and some of our customers wanted to use it as a streetlight. It was then that we got a crash course in understanding the tools and calculations, and how well our product performed against the recommendations.  We used these learnings to focus our efforts on our ROADMAX design a few years down the road, and the 2018 version of RP-8 became a major influencer for us.

The 2018 version was a massive unification of several individual IES docs into a more comprehensive discussion.  I would call the 2021 release more of an incremental improvement that helped to update and clarify multiple sections, in addition to adding a few more sections that augment roadway recommendations, such as pedestrian lighting.

What we’ve seen in reviews of existing older specifications within utilities or municipalities is that many of them include only partial specification of the RP-8 recommendations.  These typically include the average illuminance ratio and the average-to-min uniformity ratio, and some expand to the max-min uniformity value. There is a strong focus on uniformity ratios, and missing in many of the specs is the veiling luminance ratio recommendation.  This may be due to the discussion of Glare being essentially an appendix in the RP-8-2014 version, and thus veiling luminance was not a strong area of focus. It also required shifting the thought process from illuminance to luminance, a more difficult concept to grasp and to measure in the field. 

In the 2018 version, Glare got its own major section and thus marks a shift in focus.  There is also the insistence that all four of the recommended RP-8 parameters, including veiling luminance ratio, should be specified.  This helps elevate the importance of paying attention to Disability glare for any new or updated specifications for a new deployment. 

This will certainly have a positive impact on the market as a whole and for Evluma.  We have attempted to provide a product that achieves strong performance for roadway lighting while also meeting all the recommended metrics, with a major focus on minimizing Disability Glare (aka veiling luminance). 

Shiller: There is a quick reference in the white paper to the trend of decreasing CCTs for both human and wildlife health. I see Evluma luminaires and retrofit lamps go down to 2700K CCT. Does Evluma have any opinions on streetlight products beginning to be offered in 1800K, 2200K, and 2500K CCTs? Can you share if Evluma has any plans to offer any CCTs below 2700K?

Vendetti: Our current OMNIMAX post-top product already offers CCTs as low as 2000k and 2200k, so we have been a supporter of low CCTs. We do expect the trend for lower CCTs to occur in streetlights over time as more municipalities weigh the trade-offs and feedback from the communities. 

There is still a relatively large efficacy loss at 2700K versus 4000K and it increases significantly as you go lower.  For example, moving from 2700K to 2200K has an efficacy drop of 20% or more.  This could require going up in luminaire power proportionately to achieve the recommended lighting levels in RP-8, so this needs to be considered.

As far as Evluma plans, our priority is getting our full portfolio of ROADMAX versions to support 250 and 400W HPS replacements later this year and then we’ll shift to focus on additional options, such as lower CCTs.

Shiller: Thank you very much, Don, for sharing your expertise with our readers.

The Evluma glare whitepaper can be downloaded for free, here. Evluma will also be exhibiting at the upcoming IES Street and Area Lighting Conference, October 10-13, in Dallas, Texas. Their booth number is 306.

 

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Wireless Power Transfer Has Potential For Lighting

A 2020 CABA White Paper, Application of Wireless Power Transfer (WPT) in Smart Homes and Buildings provides an overview of WPT technology, as well as a market evaluation for the technology, including key global companies.

A 2020 CABA White Paper, Application of Wireless Power Transfer (WPT) in Smart Homes and Buildings provides an overview of WPT technology, as well as a market evaluation for the technology, including key global companies. Some potential applications of wireless charging to lighting include:

  1. Wireless charging of cell phones and other devices from desk lamps.
    WPT transmitters integrated into lamp bases could charge devices laid upon them.
  2. Reduced risk with electrical products installed near water. WPT eliminates power cords and wiring. Imagine more safely putting lights in sinks, bathtubs, showers and other areas near water. Both the transmitter and receiver/luminaire could be fully sealed against water.
  3. Potential for better and safer mobile battery-powered lighting, without electro-mechanical charging contacts.

The CABA WPT white paper can be downloaded here.

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CLTC Launches New Color Lab

The California Lighting Technology Center (CLTC) at UC Davis has established “The Color Lab” in collaboration with the Center for Mind and Brain. The new color lab will explore the impact of discrete color spectra on stress, mood, and alertness.

The California Lighting Technology Center (CLTC) at UC Davis has established “The Color Lab” in collaboration with the Center for Mind and Brain. The new color lab will explore the impact of discrete color spectra on stress, mood, and alertness.

A recurring question asked by building owners during human-centric lighting design is “which light colors should I use to optimize the space for the well-being of occupants?” Today, there is little data to support the use of specific light colors for increased wellness; however, with commercially available color-tuning lighting technologies, answers to this question and more are now being researched.

The Color Lab will be available to all UC Davis researchers and partners interested in studying the interactions between discrete spectra and humans. Partners from The Betty Irene Moore School of Nursing at UC Davis and the UC Davis College of Biological Sciences are already collaborating with the team on the circadian implications of discrete spectra via the Davis Circadian Protocol. This work is supported by Toyota-Boshoku America. More information is available here.

 

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Top 10 Trends In High Bay Retrofits For Warehouses & Production Facilities

A new white paper is titled The Top 10 Trends In High Bay Retrofits For Warehouses & Production Sites. The white paper was published by Lighting Expertise & Design Services (LEDS), a leading lighting retrofit firm in the United States, that specializes in lighting upgrades for warehouses and production sites.

A new white paper is titled The Top 10 Trends In High Bay Retrofits For Warehouses & Production Sites. The white paper was published by Lighting Expertise & Design Services (LEDS), a leading lighting retrofit firm in the United States, that specializes in lighting upgrades for warehouses and production sites.

The white paper goes into detail on these 10 trends:

  1. T5HO high bays have become a strong retrofit opportunity
  2. Linear integrated high bay fixtures outperform both TLED lamp retrofits, as well as round-UFO-HID form factor fixtures
  3. Controls & future-proofing
  4. CCT
  5. Rebates
  6. Facility managers are getting smarter at comparing retrofit proposals
  7. Consistency of installation quality
  8. Rising prices and supply chain disruptions
  9. Facility manager motivations are evolving
  10. Application matters

Access the full whitepaper here.

 

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New DLC Whitepaper On Non-White Light Sources For Outdoors

There is growing scientific evidence that LED outdoor white light at night is devastating global insect and bird populations, in addition to potential negative human health impacts. A possible solution is to move back to non-white lighting, such as phosphor-converted amber and direct emission amber LED sources, outdoors.

There is growing scientific evidence that LED outdoor white light at night is devastating global insect and bird populations, in addition to potential negative human health impacts. A possible solution is to move back to non-white lighting, such as phosphor-converted amber and direct emission amber LED sources, outdoors.

The DesignLights Consortium (DLC) recently introduced the first version of its LUNA Technical Requirements. The policy offers a streamlined way to identify and select LED products that meet the efficacy thresholds necessary for inclusion on the DLC’s Solid-State Lighting (SSL) Qualified Products List (QPL) while also limiting sky glow and light trespass and helping to mitigate light pollution. LUNA sets performance requirements for specific categories of outdoor LED fixtures so that municipalities, energy efficiency programs, and other outdoor lighting decision-makers can better support their energy reduction goals and abide by dark sky policies and ordinances. LUNA will also help specifiers to fulfill the light pollution and trespass requirements of LEED and WELL building programs, and help projects follow application guidance in the joint International Dark Sky Association-Illuminating Engineering Society Model Lighting Ordinance.

A subset of the DLC’s SSL Technical Requirements, the LUNA V1.0 Technical Requirements apply only to white light LED outdoor products with correlated color temperatures (CCT) between 2200K and 3000K, and do not include non-white light (NWL) LED luminaires deemed appropriate for settings such as environmentally sensitive wildlife areas. During development and implementation of the first iteration of LUNA V1.0, stakeholders asked the DLC to consider allowing NWL LED sources, such as phosphor-converted- (pc-) amber and direct emission (de-) amber products, to be eligible for LUNA qualification.

This whitepaper provides an overview of the state of the science and current recommendations for NWL light sources in outdoor lighting applications, as well as why the DLC is not addressing NWL LED luminaires in LUNA, at this time. The paper suggests the next steps to address gaps in existing research, standards, and guidelines that would make qualification feasible in the future.

Download the full whitepaper here.

 

 

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NEMA Published Recommendations For Replacing HID Lamps With LED Lamps

In February, 2022, NEMA published NEMA LL-10, Replacing HID Lamps with LED Lamps: Light Output Equivalency Claims. This document describes a method for claiming equivalency of LED lamps to the HID lamps they replace.

In February, 2022, NEMA published NEMA LL-10, Replacing HID Lamps with LED Lamps: Light Output Equivalency Claims. This document describes a method for claiming equivalency of LED lamps to the HID lamps they replace. The NEMA standard applies to omnidirectional lamps. (The equivalency for directional lamps is more complicated and requires simulation or mockups to establish). The intention is for manufacturers to use LL-10 when they prepare their equivalency claims.

Replacing high-intensity discharge (HID) lamps with light-emitting diode (LED) equivalents should be an easy and straightforward endeavor. However, currently, there are significant variations in the luminous flux (light output) of LED lamps claiming to be equivalent to a particular HID lamp wattage. When this happens, customer confusion and dissatisfaction can ensue and result in an unlevel playing field for manufacturers. NEMA provides value to the end-user and the manufacturing community with recommendations for when this scenario occurs.

Read the full article here.

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New Lighting Designer Directory Published By inside.lighting

Last month, lighting industry news website, inside.lighting, published a new Lighting Designer Directory. To find out more about this new industry resource, I interviewed Al Uszynski, Editor & Publisher of inside.lighting.

Last month, lighting industry news website, inside.lighting, published a new Lighting Designer Directory. To find out more about this new industry resource, I interviewed Al Uszynski, Editor & Publisher of inside.lighting.

DS: When did you launch the Lighting Designer Directory on inside.lighting?

AU: We’ve been contemplating a lighting designer directory for a couple of years, but the work really started in late 2021. The debut of the Lighting Designer Directory was February 2022.

Our mission was to find a way to give a signal boost to architectural lighting designers while segmenting them from other “lighting design” professions that relate to live events, film, TV production, landscape installations and the design of custom light fixtures.  Try Googling “Lighting Designer in…” for your city and it’s often hard to find architectural lighting designers among all the different search results.

DS: How many lighting designers are in the database, currently?

AU: We take a firm-centric approach and not an individual-designer approach.  We have over 350 architectural design firms listed that represent over 1,000 individual architectural lighting designers throughout the U.S. and Canada.

DS: How should a lighting designer / firm get themselves added to your directory, if they’re not currently listed?

AU: Design firms should send us their firm information via the inside.lighting contact form.  Include a link to the firm website.  We’ll take a look at their online portfolio to ensure they provide architectural lighting design services.  Easy peasy – and we never charge designers for listings or links.

DS: Do you anticipate adding any search functionality around vertical specializations, such as healthcare, hospitality, industrial, retail, etc.?

AU: That is a cool suggestion but also one that might not create the differentiation that one would expect.  We anticipate that most firms would check the questionnaire box for each of those project types.  We provide links to each firm’s website, so their online portfolio can speak to their unique expertise.  In most states and provinces there are fewer than 15 listings, so it’s a manageable experience for the website visitor.

DS: How do you feel the response has been to the directory, from lighting designers and directory users?

AU: It’s been fantastic.  When we first launched the directory, we were flooded with inquiries from designers to tweak their listings, add their satellite office location, etc. – which we take as a good sign that there’s value to the design firms.  We continue to get several new designers per week requesting to be listed.  We received lots of positive feedback from the lighting design community at the recent LEDucation 2022 trade show and conference.

DS: Who do you think are the primary users of the directory? Building owners? Architects? Construction firms? Other?

AU: The main goal is to attract visitors who are seeking architectural lighting design services.  As inside.lighting has grown to over 50,000 visitors per month, we know that we get some good traffic from architects and end-users.  The real value will come over time as Google fully indexes the directory and starts pointing organic search traffic to the directory.

We predict that later this year when someone Googles “Lighting Designer in _______” that we will be a top search result just like we are currently the #1 result for “Lighting News,” “Lighting Industry Jobs” and “Lighting Agents in __________.”

DS: How do you see the directory evolving over time?

AU: We want to grow the directory size to make it even more useful.  We’d also like to add an Instagram link to each listing.  As social media consumers, we believe the best social platform for architectural design firms is Instagram.  Seeing the visuals of their finished work, or the videos of an installation in progress is the best way to capture the value that these awesome service professionals bring to their projects.

Thanks for the thoughtful questions – we really appreciate what LightNOW does and enjoyed the opportunity to connect!

Learn More:  The Lighting Designer Directory »

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IES BIM Committee Seeks Online Votes For Two Proposed Autodesk Revit Lighting Features

The IES BIM Committee is requesting help. Have you been unhappy with the process of documenting lighting in BIM software, specifically Revit? Do you wish there were features that the software had to make the lighting workflow more compatible with those of other trades?

The IES BIM Committee is requesting help. Have you been unhappy with the process of documenting lighting in BIM software, specifically Revit? Do you wish there were features that the software had to make the lighting workflow more compatible with those of other trades?

From a lighting specifier survey conducted last year, the IES BIM committee created a series of requests to Autodesk’s Revit Ideas forum. Users post requests; other users vote on the requests. Autodesk takes notice of posts that have a high number of votes, generally those with more than 100 votes.

The IES BIM Committee has taken all the feedback that they received from the survey responses and created a series of requests on the forum. Two posts have been on the forum for a while but haven’t received enough votes to attract Autodesk’s attention.

  1. Multiple Light Sources in a single Family, without nesting. This request was authored by IES BIM Committee member Matt Kincaid and addresses the fact that nesting is required for lighting families to have more than one light source. Nesting is problematic for aiming and photometric calculations. For more information, read Matt’s post and vote!
  2. Visibility Below Cut Plane In RCP. For many of us, it is helpful to see architectural elements, like furniture or step lights, that wouldn’t typically be shown on a Reflected Ceiling Plan as we lay out our designs. Currently, Revit doesn’t have a good way of showing that. There are workarounds, like making the cut plane close to the floor, but they all have their downsides. Allowing for visibility of elements below the cut plane would make it easier for us to see what we need without messy workarounds.

The IES BIM committee is requesting that interested specifiers click on the links above and vote for these ideas, as well as any other ideas there that you would like to have implemented.

 

 

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DOE Publishes Pair Of Reports About SSL Manufacturing And R&D Opportunities

The U.S. Department of Energy (DOE) Building Technologies Office (BTO), within the Office of Energy Efficiency and Renewable Energy (EERE), has published two new reports, 2022 DOE SSL Manufacturing Status & Opportunities and  Solid-State Lighting R&D Opportunities.

The U.S. Department of Energy (DOE) Building Technologies Office (BTO), within the Office of Energy Efficiency and Renewable Energy (EERE), has published two new reports, 2022 DOE SSL Manufacturing Status & Opportunities and  Solid-State Lighting R&D Opportunities.

DOE 4

The SSL Manufacturing report examines high-priority opportunities to develop manufacturing technologies that will benefit energy-saving solid-state lighting (SSL) while also supporting an increased role in the global marketplace for U.S. manufacturing of lighting products.

The report looks at the LED chip, package, and luminaire markets and the OLED market, including production, supply chain, costs, pricing, and external influences. Characterization of the LED chip, package, and luminaire manufacturing process, equipment, and materials follows, with specific manufacturing opportunities called out. The final section looks at the OLED panel and luminaire industry with manufacturing opportunities pinpointed.

Download the full SSL Manufacturing Opportunities report here.

The SSL R&D Opportunity report examines the many critical opportunities that exist to positively impact energy savings, greenhouse gas emissions, human well-being, and the economy through research and development of light-emitting diode (LED)-based solid-state lighting (SSL). The document summarizes stakeholder input from DOE-hosted roundtable meetings, workshops, a Request for Information, and other sources.

Unlocking the next wave of advancements in SSL will require further breakthroughs in fundamental, early-stage R&D across the SSL value chain, as well as better understanding barriers to deployment for technologies with the highest decarbonization potential. This report provides detail on these advancements and the R&D necessary to make breakthroughs. Priority opportunity areas include:

  • Lighting Platform Technology R&D to support scientific, technological, integration, and manufacturing understanding and advancements of the LED technology platform that enable energy savings and support occupant health and productivity. Topics include material and device science, down-converter technology, diffuse light source materials and devices, optical delivery and control, power and functional electronics, advanced lighting concepts, and manufacturing technologies.
  • Lighting Science R&D to support research and understanding of fundamental lighting science and guide effective implementation of LED light source technology. Topics include lighting application efficiency (LAE) framework and human physiological impacts of light.
  • Lighting Integration and Validation to support field research to transition new lighting technology and understanding to practice and quantify the benefits. Topics include translating lighting research findings to practice and connected lighting with integrated controls and grid-interactive capabilities.

Download the full SSL R&D Opportunity report here.

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