2700K vs 3000K Light Bulbs: Which Warm White Belongs in Which Room
It is nine in the evening. The floor lamp in the corner throws a soft, honeyed glow, but the new ceiling downlights make the sofa look faintly grey and the wall behind it look like the inside of a shop. Both sets of bulbs were sold as "warm white". The difference between them is written on the box in small print: one says 2700K, the other says 3000K. Three hundred kelvin sounds trivial. In a room at night, with nothing but electric light to go on, it is very easy to see. This article explains what the numbers mean, where each one tends to work best, and how to test before committing a whole house to one choice. What the K number actually describes Colour temperature, measured in kelvin (K), describes how warm or cool white light appears. Lower numbers look warmer, with more yellow and amber; higher numbers look cooler and bluer. Most household bulbs sold for living spaces fall between roughly 2200K and 4000K, and bulbs above that range are more common in workshops, gara...