Lux Level Calculation

Many lighting MFG will provide their software. Contact some of them.

You can find the equations you need on http://www.intl-light.com/ . You can also download a free e-book on this subject there.

Hello zub_kci:

I thought I answered this question a few months ago?

Some of these site offer calculator to work out the lux. Others show Formulae. Hope you find what you are looking for. Please forgive any duplication if other posts have the same sites. I have not read any of the thread yet. http://www.ndlight.com.au/lighting_calculations.htm

http://www.voltimum.co.uk/find/page-11-10-2/collec-vltsearch/how-to-calculate-the-lux-level.html

http://www.lightsearch.com/resources/lightguides/formulas.html

http://www.flg.co.uk/data_lighting_design_request/data_lighting_design_req.html

This site has a calculator to work out the Lux www.flg.co.uk/data_lighting_design_request/data_lighting_design_req.html

www.lightsearch.com/resources/lightguides/formulas.html

Have a great new year!......................

"I thought I answered this question a few months ago?"

You maybe did. This is a maturing site, and some questions do get repeated by newcomers.

On the right side of the screen there are a couple of search boxes that are probably under-used. Typing in "lighting calculations" might have produced a number of hits.

On the other hand, it is easier and more entertaining to have this on line dialog go on.

Hello Ried,

I like the dialogue! And have replied to this OP several times.

Take care, thanks for the post and have a great new year..............

You can contact Fael Luce on sales@faelluce.com for their software, a good one for outdoor. You can also try the local agent of faelluce or Philips in Dubai.

This has been posted a few times. Briefly:

1. Zumtobel website http://www.zumtobel.co.uk/gb/en/product_f.htm

Go to catalogue, select your fitting, and there is an option on each selection for Quickcalc. Will output a spec sheet and diagram etc. Very useful.

2. Dialux www.dial.de software is excellent but a steep learning curve; you really need to know what you are doing. Most manufacturers have an interface plugin for Dialux. They have a quick version called Dialux Light (pun intended) but you have to download the whole thing anyway, several hundred MB.

3. Relux http://www.relux.biz/ is similar to Dialux.

4. Thorn Lighting have a similar system to Zumtobel, CalcExpress:

http://www.thornlighting.co.uk/gb/en/products_calculation_progams_f.htm

Hello zub kci

Here is a list of comparisons of lux levels.....................

Explanation

Lux is a derived unit based on lumen, and lumen is a derived unit based on candela.

One lux is equal to one lumen per square metre, where 4π lumens is the total luminous flux of a light source of one candela of luminous intensity:

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1 lx = 1 lm·m-2 = 1 cd·sr·m–2.

As with other SI units, SI prefixes can be used, for example a kilolux (klx) is 1,000 lux.

Illuminance Example

10-5 lux Light from Sirius, the brightest star in the night sky[2]

10-4 lux Total starlight, overcast sky[2]

0.002 lux Moonless clear night sky with airglow[2]

0.01 lux Quarter moon

0.2 lux Design minimum for emergency lighting (AS2293).

0.27 lux Full moon on a clear night[2][3]

1 lux Full moon overhead at tropical latitudes[4]

3.4 lux Dark limit of civil twilight under a clear sky[5]

50 lux Family living room[6]

80 lux Hallway/toilet[7]

100 lux Very dark overcast day[2]

320 lux Recommended office lighting (Australia)[8]

400 lux Sunrise or sunset on a clear day. Well-lit office area.

500 lux Lighting level for an office according to the European law UNI EN12464.

1,000 lux Overcast day[2]; typical TV studio lighting.

10,000–25,000 lux Full daylight (not direct sun)[2]

32,000–130,000 lux Direct sunlight Unicode has a symbol for "lx":

(㏓), but this is just a legacy code to accommodate old code pages in certain Asian languages, and it is not recommended for use in any language today.

Lux versus lumen

The difference between the lux and the lumen is that the lux takes into account the area over which the luminous flux is spread. A flux of 1,000 lumens, concentrated into an area of one square metre, lights up that square metre with an illuminance of 1,000 lux. However, the same 1,000 lumens, spread out over ten square metres, produces a dimmer illuminance of only 100 lux.

Achieving an illuminance of 500 lux might be possible in a home kitchen with a single fluorescent light fixture with an output of 12,000 lumens. To light a factory floor with dozens of times the area of the kitchen would require dozens of such fixtures. Thus, lighting a larger area to the same level of lux requires a greater number of lumens.

================================================ The piece above will give you some idea of the light given out by a lux.

Good luck.

You can directly measure the intensity of light using a lux meter. Came across a good model.

http://www.industrialindia.com/catalogs/Digital_Portable_Lux_Meter/Digital-Lux-Meter-HTC-LX104.pdf

Dear sir,

I found your requirement for lux calculator, please visit website www.ledrise.com you will find a calculator page,

Manoj

MELUX CONTROL GEARS P.LTD.

91-9371002099

www.melconindia.com