Conversion Lux Lumens

Lighting: Suggested power conversion Lumens and Lux

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Lumens conversion Lux and examples of recommended lighting levels according to the location or use of the room, Lux

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Lux is a lighting unit, the Lumens too, here's what to know about them:

  • Lux = 1 1 Lumens per m²
  • Lux is a unit that characterizes the rendering of lighting (result)
  • The Lumens is a unit that characterizes the power of a light source (cause)
  • Here are the actual values ​​in lumens for light bulbs, LED spots or strips
  • Example: 800 lumens bulb put into a piece of 12m², give a light 800 / 12 67 Lux =
  • Lumens are always specified on the package of economic bulb or LED provided that it is quality
  • With the surface of the part to be illuminated and the desired number of lux, you get a number of Lumens
  • Knowing the Lumens per bulb, you have the number of bulbs needed to install and therefore points of light / lights / lighting installation

Then you should know that the light output is a fairly subjective greatness:

  • Some people will be content without problem 80 lux in their living room while others want 300! The lighting is like the taste and color ...
  • Also the type of light (light spectrum) plays heavily on the luminous power of print: a light bulb in neutral white or color will give solar a much larger impression that light bulb of the same power in warm color - 2700 K - for the same power consumption!

Recommended lighting levels (high level)

  • Stairs, basements, attics: 30 lux
  • Garages, hallway, utility room: lux 60
  • Kitchen, game room, lounge, dining room, local housework, waiting room: lux 250
  • Room, kitchen work and leisure, secretarial and lab: 500 lux
  • Entrance hall, shower room, bathroom, children's room, pantry: 720 lux
  • Reading, writing, crafts, homework, crafts, drawings, makeup: 750 lux
  • Architecture, accurate work, precise control, differentiate colors 7000 lux

Regulatory lighting levels according wikipedia

  • Streets, roads and highways: 15 50 to lux
  • intermittent activity or simple task: 125 lux
  • average mechanics, office work: 200 lux
  • fine mechanics, drawings 400 lux
  • precision engineering, electronics: 600 lux
  • difficult tasks, laboratories 800 lux

Examples of other powers of current lighting (to compare)

  • Sensitivity of a low level camera: 0,001 lux
  • Moonlit Night: 0,5 lux
  • night street well lit: 20 - 70 lux
  • Local life: 100 - 200 lux
  • Well lit apartment: 200 - 400 lux
  • Local work: 200 - 3 000 lux
  • night stadium: 1 500 lux
  • Outside overcast sky 25 000 lux
  • Outdoors in direct sunlight: 50 000 100 000 to lux

The disparity of these values ​​confirms the subjectivity in the field of lighting ...


Feedback

4 comments on "Lighting: Lux power and conversion in Lumens"

  1. "Example: A 800 lumens bulb put into a 12 room, will give a 800 / 12 = 67 Lux light"

    wrong ... it would require that the light is uniformly distributed over the entire surface, which is impossible

    illumination in lux is inverssement proportional to the square of the distance from the lamp

  2. Hello

    As part of my decorator mandate I have to provide lighting for a multipurpose room whose measurements are: mx 24 10 4.13 x (height)
    knowing that my room doing 240 m² and is high that you advise me?
    I would ask
    Dalle led 45W - 297 1197 mm x mm - neutral white Vision EL
    Ref. Product: 77604
    can you give me the number of slab and rates
    With thanks
    Richard DESVAUX for ADVENTURE INDOOR
    0689376157 or 0041789415170

  3. I wish to illuminate a cold room of 600 M2 and 5 M of height, can you advise me the power to install for good lighting

    Thank you

  4. Hello, I want to illuminate a meeting room of 7,5 * 5,4 and height of 3 put with spotlights of 1 * 3W. how many bright spots could I have. cordially.

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