Secret Behind Perfect Lighting? Color Temperature & CRI Explained!
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- čas přidán 15. 06. 2024
- 🔦 Join Dustin on a vibrant journey through the world of lighting in this Electrician U episode! We're illuminating the key concepts of Color Temperature (Kelvin) and Color Rendering Index (CRI) - your essentials for crafting the perfect atmosphere. 🌟
00:00 - Intro
00:28 - What is Kelvin?
02:36 - What is CRI?
05:40 - NDR BOA and RAZOR-R
💡SPONSOR - NDR LIGHTING💡
ndrelectric.com/
🌈 Ever wondered why some lights feel cozy while others are crisp and alerting? It's all in the Kelvin! From warm, inviting 2700K glows to the bright and energizing 6500K rays, we break it down for you. Plus, discover the magic of CRI and how it brings out true, vivid colors in your space, just like the sun! 🌞
🔍 Featuring NDR Lighting's cutting-edge BOA and RAZOR-R, we show you how these concepts come to life in real-world lighting. Whether you're redesigning your home or upgrading your workspace, this episode is your guide to making informed lighting choices. 💡
Sponsored by NDR Lighting - the frontrunners in innovative, quality lighting. Explore their amazing products at ndrelectric.com/.
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#electrician #electrical #electricity #colortemperature #cri #lightingdesign #ndrlighting #electricianu #homeimprovement #lightingtips
2700 K is "warm" and comparable to candle light and fires used by our ancestors, also incandescent tungsten lamps. So most suitable for our interior living spaces. I put some 5000 K lamps in an office to show my architect partners how I could change the hue of their wall paint. Very good introduction to this topic. As a retired electrical engineer nothing irks me more than to go into a commercial space and see different color temperature lamps.
Dustin you’re a wealth of knowledge and a true role model to me in the industry. The content you put out is like no one else. I like how you get into the science of our field. You truely go above and beyond. Thanks for all you do for us!
I went from 4k to 2.7k and absolutely love it. Fyi for fog lights in a car always go 2.7k or even lower. Won't bounce off fog.
Fantastic overview of what is an extremely confusing consumer issue.
Very helpful and interested information, And those are the information most people tend to overlook, most people will just buy a light bulb off it's wattage.
I didn't know much about lighting until now. Thanks
You blew my mind.
I remember the old “green lights” on Lower Wacker Drive in Chicago when I was a little kid. Kelly green. Hizzonor da Honorable Richard J Daley, mayor at the time.
Best Tudor alive
And it gets more interesting Dustin, the actual color that we see in objects are not their true color, is just the color that escapes with the light bouncing back and into our eyes🧐
I'm very aware of colors and color temperature. And I keep my Kindle set for a beige background with blueblocker on. But it still amazes me how often I have to check that it is beige, because it very quickly comes to be seen as white.
Mmmmm, yes... I geek-out on lighting. 😊
I use 5000K for task and work areas
(and mandatory high-CRI in kitchen---low-CRI makes some foods look weird)
and 2700K for casual, accent, everywhere else...
I use harsh 6500K in outdoor motion securiry lighting just to be a jerk LOL, hey, it seems to work 😏
I was going to bring up this point. Different temperatures for different situations (both in home and in workplaces). Paying extra for better CRI only where it's needed (I would add craft spaces and wood/metal hobby spaces to the kitchen for high CRI locations) if there is a big cost difference.
The kelvin scale with lighting is badass. I want to find the perfect wall colors for the perfect light kelvin temperatures! I am on a mission! lol
My mom hates LEDs because the old ones didn't have 17k lights (but now they do), but I really like my lights to be as bright as possible, because if I want light, I want to see every detail.
I'm glad to see something that breaks this kind of stuff down.
I was literally just learning about this in my apprenticeship class lol
In a lab or shop that requires high color rendering, I recommend 50k. In an office setting, 40k, and at home in living rooms and bedrooms, i recommend 35k or lower. Commercial lighting professional for 21 years.
Thank you did not know about cri
The colour you choose will depend where you live, if you live in a cold country you'd want warm white and if you live in a hot country you'd want cold light. Fun fact about the low sodium lights is that I observatories like them as they are only one band of light, which with a bit of science and computers is very easy to block out so it doesn't interfere with their work
Have you done a video on how to do smart relay switching? I'm considering doing it in my next house but am unsure of the finer details like programming
I've been trying to find some high bay lights for my shop that are in the 4K to 5K range with a CRI of 90+ and they either don't exist or they're insanely expensive. What I'd really like is remote dimming AND remote color temperature setting via a wired interface. You can find a few lights that have adjustable color temperature via WiFi, but that's always a pain because it's bound to your phone or tablet and anyone who just happens to be in the shop can't change the color temperature.
You might want to check out tunable led strips. They offer adjustable lighting color and are usually dimmable. You can get low voltage dimmers that allow to adjust the color temp right off the wall.
Most all of my customers never choose past 3500k-4000k. I don't know many residential environments where people are choosing beyond soft or warm white other than maybe their exterior flood lights. Not many people like bright white or daylight. It's way too aggressive for most people's taste. Above that 4000k range, it gives hospital or office building vibes.
I remember when my buddy, and boss, Boogie, got a high pressure sodium light from Kennedy-King College (One of the city colleges of Chicago), and tried to grow reefer in one of the rooms in my basement! That was a long time ago before it was legal!
Reefer is still illegal in most places. Lol
@@michaelhinchey Don’t take the brown acid!
Some of the lights in the brighter range make my eyes feel under a strain. Some of these lights don't seem to fill area with light, only where it shines on.
I really do love either being in complete darkness, or bright light. I really do not like an inbetween.
Light placement is just as important
I recently learned about CRI. I have a red/green color deficiency. I've noticed sometimes I will see a color incorrectly, but then move the object into a different lighting environment and I can then see the correct color. Anyone know of any studies where they discuss CRI and how it affects persons with color deficiencies? I'm assuming I should try to get 90+ CRI lights to help with seeing color properly, but this is just speculation on my part.
Is there an easy way to explain how two different light sources like the sun (+\- 6000K) and an incandescent bulb (+\- 3200K) can both have a CRI of 100? Still not 100% on my understanding of that
Does changing the Kelvin rating affect the CRI rating?
With natural light and incandescent bulb yes. But with manufactured leds CRI is basically synonymous with the quality of the led chips. Higher quality chips almost always have a CRI of 90+.
Dustin, I always enjoy your videos. I learned about the kelvin / CRI ratings years ago while doing paint booth maintenance. If you have not dealt with automotive painters, you are really lucky. They are really, really picky about which bulbs are in their booth. They need it to be as close to daylight as possible so they can match /blend the color better. I have had to change some because the bulbs seem to lose some of their original color as they age. Sucks working for primadonnas.
CRI is actually an outdated measurement method. It’s a quick easy number to slap on, but not very comprehensive. It only tests the rendering of 8-9 colors. Many manufacturers have found a way to trick that test to render those colors well, but nothing else. The newest method is TM-30. Is uses 99 different colors, and measures both saturation and hue shift. It’s most commonly found when selecting art gallery lighting, and stage and theatrical fixtures.
Came here to say this, was not disappointed.
Thanks!
You said you preferred a "warmer" color in your living space (1:45). Eyes are important to this discussion. When I was younger, I preferred a "warmer" color. Our eyes see in "cooler" colors when we are younger so we like warmer colors. The vitreous and the lens in our eyes are clearer. Our eyes move to more "warmer" vision as we age. The vitreous fluid in our eyes ages and becomes darker. (vision experts give me a break - no space to write a textbook on vision) As we age, many of us tend to prefer "cooler" colors in rooms. I know I have felt I could see color much better as I age in "cooler" lighting. (That is so backward. 2700K is warmer but a lower real steel temp. 6000K is cooler but the real temp that would melt steel.) Dustin, as you age, I am willing to bet you will move to "cooler" lighting in your living spaces.
Every light in my home is 5000 kelvins it makes it look brighter to me the yellowish ones doesn’t look bright
All my overhead lighting is 5000 to 6500K, but we shoot for 3,500 to 4000K for the bulbs in our lamps.
In the middle of winter, when it feels like we get about 3 hours of daylight, I find that a few hours of higher spectrum light helps alleviate the cabin fever.
You live up north, right? I live in Texas and when I’ve taken trips up north in the winter, it felt like only 3 hours of daylight.
Just FYI... Completely awesome explanation on colors and what the color of light means as far as the biological/neurological process you are a bit off. Color rendering is completely subjective from person to person. Some people are born with more receptors in their eyes than others. This is important because as we age, the color receptors in our degrade. What you see is an adult is different than what you saw as child and likewise what you see in your middle-aged and Senior years is different than when you became an adult. So it's like somebody turning the contrast on an old TV down.
Every single color that is available shows all colors of the spectrum but certain colors are more in the light that they release which means that they were reflect that color more intensely to the subject. Again this is subjective to what the person has for receptors that are in higher number then other receptors.
So the color of light that best suits your eyes is going to be subjective. Be sure that you talk to your customers or if you're buying for yourself, that you sample, warm natural and cool in any space to see what best fits the needs.
You mean high pressure sodium lamp, I haven’t seen a low pressure sodium lamp in a long time
I’m somewhat confident it was a ball of nickel rather than steel.
OK, nerd moment. Kelvin is a temperature scale with zero being the absolutely coldest temp (that doesn't actually exist in reality but it made sense to choose that just to establish the baseline.
So with light, the higher the temp, the higher the frequency of light (the frequency of light is the color we see. Different frequencies give us different colors - or that's how our brain sees it).
Also, we have to be careful since light is quantized meaning that light only generates 'light' at certain frequencies. Color is what our brain tells us we see. So, Kelvin has NOTHING to do with color in reality. When we add energy to light, it will vibrate at a higher frequency and at specific higher frequencies. So this is all temperature.
Kelvin does not have a unit. You would say something like 300 K (for 300 Kelvin). 0 Kelvin by the way, is about -460 Fahrenheit or about -273 Celcius.
nerd moment over.
When using Kelvin for light color, it is referencing the radiation (light) given off of a reference black body object at that temperature. Ever notice how hot things glow different colors depending on it's temperature? Yeah, that effect is what is being indicated when talking about light color in Kelvin.
something seriously wrong with you if you prefer cool bright white light over warm soft white light
Something is seriously wrong with me 😮
There's something wrong with someone having their own opinions and choices then? No wonder why we can't have nice things
@@dylangarrett7327 yes
3000K in ceiling lights and 2700k in lamps is my go to
Depends on the setting. At work, when I want to be alert and proactive I prefer cool bright.
At home where I like to relax, I prefer soft/warm white