The light colour of led bulbs is equal to incandescents?
Not always. And in choosing a led bulb, the tone is one of the key points to consider. As for energy-saving lamps, even for those LEDs there are several shades of light, from the hot one (closest to incandescent bulbs) to the cold end (similar to neon and lights road). The reason is that, unlike traditional bulbs, those LEDs emit light in the visible spectrum, without trespassing on the infrared areas (which helps to give conventional bulbs the typical warm yellow light, as well as heat) and ultraviolet.
The colour of light produced by LEDs is usually indicated on the packaging with the words warm light, cold light or neutral light. In more technical terms, these written correspond to precise values expressed in degrees Kelvin (° K) taking the name of color temperatures.
– Warm white light = color temperature less than 3,300° K
– Neutral white light = color temperature between 3,300 and 5,300° K
– Cool white = color temperature greater than 5,300 K
To get an idea of the meaning of these values is enough to know that a traditional incandescent lamp has a colour temperature of about 2,700° K and a halogen lamp reaches 3,000° K. Sunlight at noon on a clear day, has a colour temperature of 5,500° K, the blue sky reaches 8,000° k. Therefore, in practice, a warm white light led bulbs will have a shade similar to that of traditional bulbs, towards the yellow. A neutral or cold white light model will tend towards the blue ice.
The market is still easier to find cold white light led bulbs instead of warm light. The reason is that, with the same power (in watts), cool white models of the older generation were more light. Now, however, the models of the latest generation, whether hot or cold white light, they no longer differences in efficiency.