We promise that we can show you a super-easy way to boost your productivity. Hang with us as we lay a little bit of background, but don’t worry. It’ll be worth it (an much easier than you think).

Sooo… have you ever heard of the Kelvin scale? Vaguely familiar? Blank? Well, not to worry…most of us retain don’t retain a lot from science classes, but believe it or not, it is an integral part of our daily experience. In fact, even a very basic understanding of the Kelvin scale, and applying it in your home lighting can improve your mood, productivity, and even long-term health. Yes! All from lighting. Read on for some applicable science and a few trivia-friendly facts from your friends here.

1. What It Is

Let’s start with the very basics. What is the Kelvin scale? Most used as a temperature measurement that ranges from absolute zero to the heat of the sun, Kelvin also measures the color temperature of light, both artificial and natural. Its applications are widespread, stretching from astrology to photography to biology.

There is plenty of in-depth science to explain how one scale can measure the temperature of celestial bodies and also classify light bulbs… But for now, let’s just keep it super simple to understand the basic concept. Just imagine an experiment where a metal is subjected to various levels of heat.

Depending on the Kelvin temperature (amount of heat that it absorbs), the metal glows in colors such as amber, yellow or blue. So, a certain temperature of heated metal = certain color of light emitted. So even though light bulbs don’t usually function at those exact temperatures, we use Kelvin because it’s an exact way to classify the color of light emitted by different light sources. Kelvin then is the color of light…and as it turns out…it matters a lot.

2. Why It Matters

Moving on from the background science… Why worry about the Kelvin and color of light? First, check out the scale itself. (The higher the number, the cooler/bluer the light. The lower the number, the warmer/redder the light.) Color temperatures of the Kelvin scale range from 1,000K-10,000K.

• 1000K-1900K is candle light hue
• 2000K-2900K is a warm, yellowish white.
• 3000K-4500K is a cool white.
• 4600K-6500K is comparable to daylight.
• Above 6500K the light has increasingly more blue tones.
• 10,000K is the color of the blue sky.

Imagine if your home was lit only by candles, or if it was constantly filled with bright daylight. Because our bodies are programmed to react to different light temperatures in different ways, it makes a huge difference in your mood, energy, daily tasks, ambiance, ability to concentrate, and even your sleep. This is not to say that any one type of light is better than another—simply that the color temperature impacts us…. the functionality and atmosphere of our homes and workplaces.

Different light bulbs emit different colors. Not all light bulbs are created equal. And the color of light emitted by your light bulbs is making its impact right now, though it may go unnoticed. Excessively cool tones, insufficient quantity of light, or excessive artificial light before sleep can impact mood, productivity, and even increase chances of disease. Fortunately, your new knowledge of the Kelvin scale can help you fine tune your home lighting.

3. How to Use It

Thanks to a little help from science, you can use the Kelvin scale to choose lighting that maximizes your health and productivity at home. Consider your daily activities and form a home lighting plan that suits your family’s needs—which rooms are meant for productivity, and which for relaxing?

In residential lighting, the most common color temperatures that people use and prefer are 2700K to 3000K. Why? Warmer colors create an atmosphere of coziness, calm, and comfort. Consider warm lighting for your bedrooms, family room, and other rooms for social gathering. For an office, garage, or workspace, cool lighting can create a more clean, precise atmosphere to facilitate productivity.

As for the kitchen, bathrooms, laundry ad hobby rooms where you need most productive so it’s a good choice to mimic natural light around noon with warmer light around 3000-4000K.

Here is an easy rule to follow:

In areas where you need higher degrees of concentration and productivity, you need a higher Kelvin (up to 3500-4000k), where you need lower levels of concentration and productivity, use a lower Kelvin (1500k – 3000k).

Need advice? Feel free to discuss your ideas with one of our lighting experts. We’re here to help you build a home atmosphere that’s best for you.

Bright, natural lighting can contribute to alertness and increased energy in the mornings, or any time of day. Of course, it does the same at night, so it is best to avoid bright, overhead lights when it’s time to rest. Darkness and warm dim lights, especially at eye level, mimic the natural rhythm of the sun and notify your brain that it is time to slow down, so they’re a great tool to use in the evening hours. 

1. Excessive Blue Light Can Lead to Sleep Deprivation and Stress 

All lights have a color rating that ranks them on how much warmth (reddish, yellowish lights) or coolness (blue or white lights) they emit. Our bodies respond differently to each, but blue lights are especially worth mentioning. While exposure to blue light can provide a much-needed energy boost during the day, it also makes it much harder to sleep at night. Exposure to blue light from smartphones, laptops, and even low-quality bulbs in the hours before bedtime suppresses the bodies’ production of the sleep-inducing hormone melatonin, which can make it harder for us to drift off to sleep.

Though it’s difficult to achieve a consistent sleep schedule, sleep-deprivation has a whole host of emotional and physiological side effects, from impaired judgment and heightened stress to higher blood pressure. To avoid this and protect precious sleep, consider using indirect or accent lighting at night, or perhaps installing a dimmer to make your main light adjustable. Whenever possible, limit screen-time before bed to reduce your exposure to blue light for a better night of sleep.

2. Warm Lights Enhance Relaxation and Mood Regulation 

Just like blue light from screens can keep you awake; warm lighting can aid relaxation and emotional regulation. In one study, participants experiencing anxious feelings calmed down more quickly in rooms with warm, cozy lights, as opposed to rooms with bright, blueish lights.

The principle applies equally in your home, which is why residential spaces most often use bulbs between 2700k and 3000k. Lights in this Kelvin range (the ranking of light color) are warm and relaxing, well-suited for your everyday environment. Lighting your spaces with lamps, dimmable lights, and layers of lights can enhance this even more, allowing you to control the quantity of light as well as its calming color.

3. Poor Lighting Worsens Depression, Vitamin D Deficiencies, and Migraines  

We’ve all heard that poor lighting could cause eye damage, especially when reading, but what other effects can poor lighting have on us in our homes? Inadequate light can irritate existing conditions such as depression and vitamin D deficiencies, while proper lighting is known to improve mood and energy levels.

Surprisingly enough, insufficient light is not the only health-related lighting hazard. Overly bright, harsh light can be similarly detrimental to mood and productivity since it often triggers headaches and migraines. 

4. Glare Causes Poor Eyesight and More 

As stated above, many are already aware of the danger that dim lights have for our eyesight. What most underestimate, however, is the similar risks posed by reflected light and light glare. Blazing overhead lights, badly positioned spotlights, or reflected lights from screen can increase irritability, drowsiness, headaches, and double vision.

This obviously varies based on eye conditions, exact lighting configurations, and more. However, next time you flip that switch, it would not hurt to ask how that lighting makes you feel, and if different lighting might be more helpful for productivity and positivity. 

5. Natural Light Increases Work Productivity

Research on office lighting and employee productivity provides great insight into personal and professional productivity. Natural light, and lots of it, helps to create the happiest, most productive work environment, while dim lighting can decrease work productivity. Working in a room with dim lights can cause eye strain, headaches, and drowsiness, all of which interfere with typical tasks.

Life has plenty of complexities, and a house full of perfect light bulbs obviously cannot solve all of them. What proper lighting can do, however, is eliminate visual stresses from your environment and send the right signals to your brain, helping it do what is best for you.

Lighting done right increases energy and productivity, not to mention relaxation and mood regulation, while bad lighting can interfere with sleep and worsen depression and migraines. For any questions about how to light your home and maximize health through lighting, call our experts at Lit Living. We are committed to your well-being and we are confident we can help.