This lower level of melatonin keeps people alert in the same way coffee does. Other benefits of blue light include lowering melatonin, which is created in our glands and basically puts us to sleep. Researchers at the University of Greenwich found in a two-month study that the workers they put under “blue-enriched light bulbs” reported feeling “happier, more alert and had less eye strain.” If you don’t have access to daylight, studies have also found that working under “blue-enriched” light bulbs that are 17,000K actually increases work performance by supporting mental acuity, vitality and alertness while reducing fatigue and daytime sleepiness. With this strategy, light is able to travel and disperse throughout the office space. Natural light from both the morning and evening has been found to decrease depression and improve mood, energy, alertness and productivity.Īs a result of these findings, Felderman and Keatinge prefer to bring down drywall and “use an extensive amount of glass” in the offices they design. Exposure to natural light is especially beneficial to workers cooped up in an office all day. A number of studies have found sunlight can have a multitude of benefits on our health. It turns out cooler light makes workers more productive. So, according to science and experts, what color temperature lighting is most beneficial in a work setting? An overcast winter day is measured at about 7,000K and is considered a cool color.A typical sunny day is about 5,000K or 5,500K and is considered a cool color.A sunset is about 4,000K and is considered a cool white color.The glow-from-the-fire lighting is about 2,000K and is considered a warm color.Lower color temperatures (up to 3,000K) range from red to yellowish-white in tone and are called warm colors.įor a better idea, Felderman and Keatinge gave some examples of what these color temperatures look like in everyday life: Mid-range color temperatures (3,100K–4,600K) appear cool white. Higher color temperatures (4,600K or more) appear blue-white and are called cool or daylight colors.
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Lower color temperature light sources are called “warm” because they emit red, orange and yellow color, whereas higher color temperature light sources are called “cool” because they are on the violet and blue end of the color spectrum.īelow is a rundown of the color temperatures in light sources: As the temperature increases, the horseshoe will start to glow different colors from red, then orange, then yellow, then white, and, finally, it will emit a bluish-white color. Just take, for example, a blacksmith heating up an iron horseshoe. As the temperature increases, the object changes colors and emits certain colors of that light. Temperature of light, measured in Kelvin (K), is a numerical measurement of the color that’s emitted when an object is heated in a high enough temperature. For those unfamiliar with lighting temperatures and colors, what do they mean?