The Led mixes up this equation dramatically. Because in the days of incandescent light bulbs, everyone knew that the amount of light (and heat) was directly related to the watts.Ī watt is a unit of power from which the energy consumption of a light source can be determined, in kWh. The higher wattage of the lamp indicated that it was brighter. But why? People are quite conscious of buying light bulbs after looking at the watts, as this has been easy when incandescent lamps were the only technology available. People usually buy each light according to its wattage. For the kitchen, 400 – 500 lumens per square metre are needed, while for the bathroom (where make-up is applied) 600 – 800 lumens per square metre can be considered. Different rooms in the home need different levels of lighting. In this respect, the size of the room is therefore a decisive factor. The number of lumens depends on several factors, such as the shape and size of the room, the height of the ceilings, the needs of the person and the type of light source (shade, direct, indirect).Īccording to various sources, the basic amounts are calculated to 1 m2. Lumens (abbreviated as lm) therefore express the total visibility of light from any light source to the human eye.Įxactly how many lumens are needed to say that we are in a well-lit space? Such an accurate reading can be multiplied by the different uses of the premises. The lumen is the best indicator of the overall light output of light. The exact figure is given by the manufacturer, as the specification is influenced by factors such as the shape of the light body, colour and other factors affecting light reflection. The higher the lumen value, the higher the lighting efficiency of the bulb, and vice versa. It therefore indicates the luminous intensity of light. ![]() The luminous flux, or lumen output, is an expression of the luminous efficacy of light. ![]() Lumen and wattage recommendation for different rooms.Different lighting technologies and energy efficiency.
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