If you're asking yourself what color light has the least amount of energy, you've probably got your eyesight tested recently and they showed you an interesting chart showing how much energy each color of light has. You may have concluded that white light has the least amount of energy. Or blue light. Or green light. Or yellow light.
If you were correct, then you're incorrect. In fact, this isn't really what happens. What happens is that the amount of energy per unit of light is different for all the colors of light. That's why it is sometimes referred to as "the color spectrum".
This can help you understand why it is sometimes called "white light" or "infrared light". The amount of heat that a white light has is measured in gigawatts (or WHatts). A HEQ (High Efficiency Particle Research) plate is used to measure the amount of heat given off from a particular white light at different temperatures under identical conditions. The lower the temperature of the source, the more the energy and higher the frequency of the particles that are emitted. At very high temperatures, infrared radiation has the least amount of energy and the radiation is known as infrared electromagnetic radiation.
So, now back to your question: What color light has the least amount of energy? Well, the answer depends on which color of light we are talking about. If you measured the amount of light given off by a neon sign, a phosphor, or even a silicon semiconductor, you would get different amounts of radiation depending upon which color you chose. If you measured the amount of heat given off from a white light bulb, you would get different amounts of heat depending upon which color of light you chose.
Now, for all practical purposes, it is considered better to have yellow (that's the color of light yellow) than red (that's the color of light red). Why? Because yellow is the color of rest; it restates everything white does, whereas red gives birth to all things white and everything black. Therefore, if we want to create a balance world, we should use yellow light. In most cases, we are not able to use yellow light because of the lack of purity, but since white light is the only form of pure light available, it is the only thing that can be used for white light sources.
What color light has the least amount of energy? The light that emits the most amount of radiation is known as the blue light. Most white light bulbs utilize the blue light, but if you install a blue light tube in your home, you can have your very own personal white light. You may not be able to have a pure blue light, but you can have the warmth and the beauty of a warm summer's day behind your back door!
