In a household setting, you may like one colour temperature and stick with that throughout the home or you may choose different colour temperatures to set a different feel for each room. Choosing between these types of light bulbs is a personal decision. Take a look at the image below and you’ll get an idea of how different lighting can affect an office setting. The lower the kelvin, the warmer a bulb appears.ĬFLs and LEDs can also provide a “warm white” appearance, and you’ll need to choose CFLs or LEDs if you want the other colour temperatures listed below.īulbs that provide light at around 3000K to 3500K may be considered “white” or “soft white.”īulbs that provide light at around 4100K to 5000K are considered “cool white” and these start to have a slightly blue feel to them.īulbs that provide light at around 6500K are considered “daylight bulbs” and these have a definite blue and cool sensation to them. As an incandescent or halogen bulb is dimmed, it becomes even warmer - slightly orange - in appearance. This is the light colour provided by an incandescent bulb (2700K) or halogen bulb (2850K). (Also see the image at the end of this post.)Ī “warm white” bulb is usually considered to be below 3000K (3000 kelvin). There is range for different shades of white LEDs. A cooler light (higher kelvins) gives off a white-bluish light. But the following is a good general guideline to what these descriptions mean. A warmer light (lower kelvins) is perceived by the eye as more yellow. Visit different websites and you’ll get different answers. It’s important to note that there is no absolute consensus on what kelvin ratings equate to what colour temperature descriptions.

Besides using terms like “warm white,” “cool white,” and “daylight” to describe these colour temperatures, we also rate these in kelvin, which is a temperature scale. This has nothing to do with actual heat from a light bulb, but only with the appearance of the light. The warmth or coolness of light is known as its colour temperature. These whiter or bluer colours are considered “cooler” in appearance. The cold blue light with the highest CCT is the best. The cold light of 6,500 K offers an excellent level of brightness and improves overall attention. The natural light of 4,900 to 6,500 K is the best solution for eyes that allows comfortable work. When CFLs came along, we started seeing lights that appear whiter and sometimes almost blue when compared to the warmth (think “yellow”) of incandescent bulbs. The warm light of 2,500 to 3,000 K will help you relax while reading and rest better after that.

When we only had incandescent bulbs available for most of our household lighting, we were familiar with a warm look to our lighting. What are Warm White, Soft White, Cool White, and Daylight Light Bulbs?

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As the color temperature increases, the cooler the lamp will look Depending on this.

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Led warm light vs cool light