There are also many situations where you want to use lighting for different purposes. You want to light the room at the touch of a button. For example, the main light in the bedroom or the general light in the living room. General lighting often involves the main switch in the room. In this case, you choose functional lighting. You want to illuminate a specific area because you need light there. We distinguish between general lighting and task lighting.įor task lighting, think of a kitchen sink or a bathroom sink. When choosing the right lighting, it is a good idea to consider the purpose for which you need the light. A light colour reflects light and you will need fewer lumens than in a dark room where light is not reflected from the walls. In a room with dark walls, you will need more light than in a room with bright or white walls. The shape of the room and the height of the ceiling also play a role. For example, the size of the room in a large room you need more light and therefore a higher number of lumens than in a small room. The number of lumens you need for a room depends on many factors. This 'light spill' is not included in the lumen count. Along the edges you can see some extra light, which is light that is left over and does not fall within the 90 degree angle. The light is emitted at a 90 degree angle. So you know that if you come across a lamp with, say, 200 lumens, this means that the light source emits 200 lumens at a beam angle of 90 degrees.īelow is a picture of a lamp where you can see that the lamp has a beam angle of 90 degrees. From now on, we will look at the light emitted at a beam angle of 90º. This means that we no longer have to compare apples and oranges, but can fairly compare luminous intensities. This is why the European Union has introduced the concept of 'useful lumens'. Because each lamp has a different beam angle, it is difficult to compare lumens over such a wide range. You can imagine that if the light is scattered around the room like a candle, it will feel less 'bright' than if the same amount of light is focused like a recessed spotlight. A spotlight only gives light in one direction. A candle, for example, gives light all around. When we talk about lamps and their luminosity, there are different types of lamps, each of which provides light in its own way. In general, the higher the number expressed in lumens, the brighter the light. We will give you some examples to help you understand this term. For example, a candle gives orange light and a street lamp gives white light.
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