Lux Formula 2r2y5x

LUX CALCULATION SHEET FOR INTERNAL LIGHTING JOB N0 JOB TITLE AREA RECOMMENDED ILLUMINATION AS PER CIBSE (E) SPACE DATA ROOM LENGTH IN METRE (X) ROOM WIDTH IN METRE

(Y)

AREA IN (M²) = X*Y FIXTURE MOUNTING HEIGHT IN METRE

(H)

AHB 431 3BSA M.BED ROOM 150

LUX

4.5

MTR

3.75

MTR

16.875

M²

2.9

MTR

TYPE OF FITTING TYPE 01 TYPE 02 TYPE 03

LAMP 8 0 0

AREA TOTAL LUMENS (F)

5600

ROOM INDEX, R = (X*Y) / H*(X+Y)

0.71

WATTS 50 50 8

MAINTENANCE FACTOR (REFLECTANCE) FOR CEILING = 0.7 WALLS = 0.5 FLOORS = 0.2

(As per CIBSE Standard)

LUMENS /WATT 14 60 60

LUMENS/FIXTURE 5600 0 0

( As per CIBSE Standard)

MAINTENANCE FACTOR (M)

0.7

UTILIZATION FACTOR (U)

0.74

ILLUMINATION ACHIEVED, E=F*U*M / A

172

( As per CIBSE Standard)

LUX

LUX CALCULATION SHEET FOR INTERNAL LIGHT 1 2 3 4 5 a.

JOB N0 JOB TITLE AREA RECOMMENDED ILLUMINATION AS PER CIBSE (E1) SPACE DATA ROOM LENGTH IN METRE (X)

b.

ROOM WIDTH IN METRE

c.

AREA IN (M²) = X*Y

6

FIXTURE MOUNTING HEIGHT IN METRE

7

TYPE OF FITTING TYPE 01 TYPE 02 TYPE 03

LAMP 8

8

AREA TOTAL LUMENS (F)

5600

9

ROOM INDEX, R = (X*Y) / H*(X+Y)

0.71

10

REFLECTANCE CEILING = 0.7 WALLS = 0.5 FLOORS = 0.2

11

MAINTENANCE FACTOR (M)

0.7

12

UTILIZATION FACTOR (U)

0.74

13

MINIMUM REQUIRED NUMBER OF LUMINARIES N = E1*A / F*U*M

0.87

14

ILLUMINATION ACHIEVED, E2=E1/N

172

(Y)

AHB 431 3BSA M.BED ROOM 150 4.5 3.75 16.875

(H)

2.9

OR INTERNAL LIGHTING

LUX MTR MTR M² MTR WATTS 50 50 8

LUX

LUMENS /WATT 14 60 60

LUMENS/FIXTURE 5600 0 0