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What is the formula to calculate the number of lamps in a given cross sectional area?

what is the formula to calculate the number of lamps in a given cross sectional area?

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تم إضافة السؤال من قبل mehari yalew , electrical installation designer , national difence
تاريخ النشر: 2015/09/18
Muhammad Maaz Siddiqui
من قبل Muhammad Maaz Siddiqui , AGL & MEP Facilities Manager , RAK International Airport

The required No of Fixture=required Lux x Room Area/MF x UF x Lumens per fixture

MF =Maintenance factor

UF= Utilization Factor

SHR=Space hight ratio

Max spacing between the fixtures

Max spacing=Cielling to desk hight x SHR

Number of rows required

No of rows=width of room/max spacing

The axial spacing between each fixture

Lenght of room/number of the fixture in each row

transverse spacing

=width of room/number of the fixture in the row

 

 

noor mashareh
من قبل noor mashareh , مهندسة تصميم , Blue stars for green energy

NUMBER LAMPS = ILLUMINATION LEVEL(LUX REQUIRED) X AREA} /  (FXMFXUF)

Diroz Alam
من قبل Diroz Alam , Senior Electrical Enineer , Omrania & Associates

NO. OF LAMPS(N) = {ILLUMINATION LEVEL(LUX REQUIRED) X AREA} /  (FXMFXUF)

WHERE F= FLUX IN LUMENS

                MF=MAINTENANCEFACTOR

               UF=UTILIZATION FACTOR

MOHAMMED SHEFEEQ KODAKKATTU THODI
من قبل MOHAMMED SHEFEEQ KODAKKATTU THODI , ELECTRICAL ENGINEER , ATGC L.L.C

number of lamps = (AREA*LUX) / (LOL*COU*MF)

Wher,

          Area= area of room

          LUX= Required lux level of room 

          LOL = Lumens of light you are using 

          MF= Maintanence factor (for ac room which is0.8, for non ac room0.7,for road side shop .6,                    for work shops which is .5)

           COU= Room index = (length*width) / ( (length + width)*Hm )

            Hm = Room height - Reference plane Height

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Mohammed Azmath Ali Mohammed
من قبل Mohammed Azmath Ali Mohammed , site engineer , Enrun india pvt ltd

No of lamp = L*W*LL /CUF*MF*TOF*TL L= length of room W=width of room LL=lux level CUF= coefficient utility factor MF= maintenance factor TOF=type of fixer TL= total lux

Elsayed Magdy Elsayed Mohamed Mohamed
من قبل Elsayed Magdy Elsayed Mohamed Mohamed , Security,……………

All calculation already calculated by Dialux 

and Dialux consider all the factors which specified before calcualting

ashraf talaat
من قبل ashraf talaat , MEP Coordinator , Saudi Bin Ladin Group

no of luminaire= llumen required x Area m/lamp lumen xU F x M F

Anwar Hussain
من قبل Anwar Hussain , Electrical Engineer , PGS Gulf Contracting LLC

number of lamps = (AREA*LUX) / (LOL*COU*MF)

Wher,

          Area= area of room

          LUX= Required lux level of room 

          LOL = Lumens of light you are using 

          MF= Maintanence factor (for ac room which is0.8, for non ac room0.7,for road side shop .6,                    for work shops which is .5)

           COU= Room index = (length*width) / ( (length + width)*Hm )

            Hm = Room height - Reference plane Height

Donaldo De Avila Caballero
من قبل Donaldo De Avila Caballero , tecnico electricista , termotecnica

em.gif

donde.

  • Em es la iluminancia media sobre la calzada que queremos conseguir.
  • rdto3.gif es el factor de utilización de la instalación.
  • fm es el factor de mantenimiento.
  • phil.gif es el flujo luminoso de la lámpara.
  • A es la anchura a iluminar de la calzada que en disposición bilateral pareada es la mitad (A/2)y toda (A) en disposiciones unilateral y tresbolillo
  • d es la separación entre las luminarias.

SAHAD KOYANGODAN
من قبل SAHAD KOYANGODAN , MEP Electrical Engineer , Consoldiated Proserve Electromechanical Works LLC.

The required No of Fixture=required Lux x Room Area/MF x UF x Lumens per fixture

mahmood mahmood
من قبل mahmood mahmood , electrical engineer , Ministry of Electricity

one meter square

 must have 23 va              

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