LED bulbs oﬀer light in a range of colour temperatures, it’s what makes light feel ‘warm’ or ‘cool’. A lower colour temperature produces a warmer, more relaxing light. A higher colour temperature emits a cooler, more refreshing light. Colour temperature is measured by Kelvin (K) and can be found on the packaging or in the light bulb’s speciﬁcations. If you’re looking for a new bulb that is the same “colour”, choose light with the same colour temperature. Some bulbs like SceneSwitch oﬀer multiple colour temperatures in one bulb.