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Lux vs candela vs lumens1/17/2024 The pupil will become smaller which causes everything outside of the light beam to become even darker. If the Strike 500 would have directed all its light on the same surface area as the Strike 300 (and thus resulted in a higher Lux at 10-meter distance for the Strike 500) the human eye will adapt to this extreme bright spot in front of you. The 'density of both lights is the same, the 500 Lumen of the Strike 500 are just spread out over a larger area, which gives you a good view of the area around you on the bike.Īnother major reason for not keeping the light angle the same in both the Strike 300 and 500 is because the human eye will adapt the light. The difference between these two lights is mainly the angle at which the light is spread out. But as you can see, they both have the same amount of Lux at the 10-meter distance point. Before reading this blog you would probably have thought that the Strike 500 is a better light in all dimensions. In the table aside you can see the Lumen and Lux values of these lights.Īs you can see the Strike 500 has 500 Lumen (output of the light source, remember?) and the Strike 300 has 300 Lumen. Below, we have two illustrations of both the Strike 300 and the Strike 500. It will help your understanding of these terms to see how it exactly works in real life. Now that we have explained the theory of the terms Lumen, candela, and Lux. Below, you will find a simplified calculation of how Lux exactly works: You will see in the specifications of our lights that the amount of Lux is given mostly on a one-meter distance. Lux completely depends on the distance at which it is measured. If the surface is ten meters away from the light source, the light appears less strong on the surface but probably on a much bigger area. You will see a massive bright light beam on the surface. You can imagine that this depends on how far the surface is from the light source.įor example if the surface is only 50 centimeters away from the light source. Lux is given in lumen per square meter of the surface that is lit. In other words how much of the original light that is emitted (Lumen) will actually reach a particular surface in front of the light. Lux is the illuminance of a surface perpendicular to the light source. Now that you have an understanding of both Lumen and Candela, this last term will make complete sense and you will see why Lux is probably the most important unit we discuss here. It gives you the most fundamental value of the strength of your light, not impacted by a lens, direction, or anything else. We do this because this is the amount of light emitted and thus important to determine the strength of a light source. We measure all our lights in Lumen, which you will find in the specifications of our lights. A blue light source with the same amount of watts will therefore have a higher amount of lumen than a red light with the same amount of watts, only because we perceive this light as more powerful. For example the human eye sees blue light as a more intense light than red. The intensity of the light source depends on how we perceive that light. This means that it takes the human eye into account to determine its value. So, Lumen is the total amount of light that is emitted from a light source. It tells you the intensity of the light source without giving you any information about the direction of that light. Lumen is a unit that expresses the amount of light that leaves the source.
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