When it comes to lighting your home or office, one of the most important factors to consider is the colour temperature of your light bulbs. The colour temperature of a light bulb is measured in Kelvin (K) and can range from warm, yellowish tones to cool bluish tones. In this article, we will explore the various Kelvin colours for light bulbs, ranging from 2700K to 6500K, and explain their differences and uses.