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Lighting
Instructor : Eng. Wael Younis
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Some Technical Expressions
Luminous Flux ( ) ( (
(Lumen (Lm
Luminous Efficiency ( ) ( (
( / )Lm W
P
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Some Technical Expressions
Illuminance Flux (E) ( (
Lux Lm/m) 2)
2( / )E Lm m Lux A
m( 2 (A :
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Some Technical Expressions
General Color rendering Index ) (
,
100 ( ) .
100 .
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Good Lighting Conditions In Buildings
. Illuminance Flux
Lux .
Luminaries .
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Required Illuminance for Different Places
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Required Illuminance for Different Places
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Incandescent Lamps
Fluorescent Lamps
Industrial Lighting Sourses
A. Filament Lamps
B. Gas Discharge Lamps
High Pressure Mercury Lamps (HPM)High Pressure Sodium Lamps (HPS)
Low Pressure Sodium Lamps (LPS)Metal Halide Lamps
Blend Light Lamps
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Incandescent Lamps
Industrial Lighting Sourses
1. Outline of Glass bulb2. Low pressure inert gas
(argon, neon, nitrogen)3. Tungsten filament4. Contact wire (goes out of
stem)5. Contact wire (goes into stem)6. Support wires7. Stem (glass mount)8. Contact wire (goes out of
stem)9. Cap (sleeve)10. Insulation11. Electrical contact
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Incandescent Lamps
Industrial Lighting Sourses
Luminous Efficiency ( ) = 10-15 Lm/W
Life Time = 1000 Hr
General Color rendering Index = 100
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Fluorescent Lamps
Industrial Lighting Sourses
A fluorescent lamp orfluorescent tube is a gas-discharge lamp that useselectricity to excite mercuryvapor. The excited mercuryatoms produce short-waveultraviolet light that then
causes a phosphor tofluoresce, producing visiblelight.
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A preheat Fluorescent Lamp Circuit using an automaticstarting switch
Industrial Lighting Sourses
A: Fluorescent tube, B: Power (+220 volts),C: Starter, D: Switch (bi-metallic thermostat),E: Capacitor, F: Filaments,G: Ballast
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A preheat Fluorescent Lamp Circuit using an automaticstarting switch
Industrial Lighting Sourses
C: Starter, D: Switch (bi-metallic thermostat),
E: Capacitor,
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A preheat Fluorescent Lamp Circuit using an automaticstarting switch
Industrial Lighting Sourses
F: Filaments,
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A preheat Fluorescent Lamp Circuit using an automaticstarting switch
Industrial Lighting Sourses
G: Ballast
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Compact Fluorescent Lamps (CLF)
Industrial Lighting Sourses
A type of fluorescent lamp
Energy saving light
Many CFLs are designedto replace anincandescent lamp
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British Zonal Method (BZ)
Lighting Calculations
Desk or Bench
Height
0.85 m
Mounting Heightof Fitting (from
working plane)
Hm (m)
Room LengthW (m)
SuspensionHeight from
Ceiling
Hs(m)
Room WidthL (m)
Hm=Ht-Hs-0.85
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British Zonal Method (BZ)
Room Index
The room index is a number that describes theratios of the rooms length, width and height.
( )
LWKr
Hm L W
Where :
L = Room LengthW = Room WidthHm = Mounting Height of Fitting (from working plane)Work Plane = Desk or Bench Height
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British Zonal Method (BZ)Reflection Factor
Reflection factor depends on :
Ceiling reflection factor c
Wall reflection factor w
Flour reflection factor f
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British Zonal Method (BZ)Reflection Factor values according to color
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British Zonal Method (BZ)Reflection Factor values according to material
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British Zonal Method (BZ) :
( , , , , )
Reflection Factor =0.5
( , , , , )
Reflection Factor =0.3
( , , , , )Reflection Factor =0.1
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British Zonal Method (BZ)Depreciation Factor: ( w = 0.3)
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British Zonal Method (BZ)S/Hm factor:The ratio of s pacing between the lighting units to
Height of the unit from the work plane.
S/Hm =1.2 82%
This means that for every 1 meter of mounting height(above work plane) we should have a maximum 1.2meters between fittings.
Andmin
max
100 82EE
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British Zonal Method (BZ)Red. factor:Depends on the power of the lamps on the unit
Ex.Red. Factor
2x40W=1.02x62W=0.92
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British Zonal Method (BZ)Utilization factor (Uf):
This is a value between 0 and 1 that represents thepercentage of total lamp lumens in the room that fall onthe work plane.
It depends on :Reflection factor Room idex
Lighting unit type.
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British Zonal Method (BZ)Technical Data for Industrial Lighting Units
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British Zonal Method (BZ)Technical Data for Industrial Lighting Units (F type)
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British Zonal Method (BZ)Technical Data for Industrial Lighting Units (D type)
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British Zonal Method (BZ)Technical Data for Industrial Lighting Units (S type)
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British Zonal Method (BZ)Technical Data for Industrial Lighting Units (DD type)
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British Zonal Method (BZ)Technical Data for General Lighting Units
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British Zonal Method (BZ)Technical Data for General Lighting Units (C type)
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British Zonal Method (BZ)Technical Data for General Lighting Units (E type)
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British Zonal Method (BZ)Technical Data for General Lighting Units (G type)
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British Zonal Method (BZ)Technical Data for General Lighting Units (H type)
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British Zonal Method (BZ)
Luminous Flux ( ) for Different lighting units
i i h l h d ( )
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British Zonal Method (BZ)
Luminous Flux ( ) for Different lighting units
B i i h Z l M h d (BZ)
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British Zonal Method (BZ)
Lighting Calculation Sheet
Hm=H t-Hs-0.85Height from the work plane (m)
HsSuspension Height (m)
HtTotal Height (m)
ARoom Area (m 2)
LRoom Length (m)
WRoom Width (m)
Project
Li h i C l l i
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British Zonal Method (BZ)
Lighting Calculations
Desk or BenchHeight
0.85 m
Mounting Heightof Fitting (from
working plane)
Hm (m)
Room LengthW (m)
SuspensionHeight from
Ceiling
Hs(m)
Room WidthL (m)
Hm=Ht-Hs-0.85
B iti h Z l M th d (BZ)
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British Zonal Method (BZ)
Lighting Calculation Sheet
Uf Utilization Factor nLamp number in the unit
f Flour Reflection Factor wWall Reflection Factor
cCeiling Reflection Factor
Room Index
( )r m
LWK
H L W
B iti h Z l M th d (BZ)
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British Zonal Method (BZ)
Lighting Calculation Sheet
Longitudinal Lighting Unit Number
Number of calculated LightingUnits
ERequired Illuminance Flux (Lux)
Lamp Luminous Flux (Lm)
KRed. Factor
FDepreciation Factor
f
EAFN
nU K
L
LNN
W
British Zonal Method (BZ)
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British Zonal Method (BZ)
Lighting Calculation Sheet
Calculated Illuminance Flux (Lux)
Calculated S/Hm Ratio
Cross Lighting Unit Number
L
WNN
W
/ mm
S AH
H N
.f
e
N nU KE
A F
British Zonal Method (BZ)
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British Zonal Method (BZ)
Applications: Lighting of Drawing office
: :
:
General Lighting Unit (C type) , Fluorescent2x40W
British Zonal Method (BZ)
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British Zonal Method (BZ)
Applications: Lighting of Drawing office
Hm=H t-Hs-0.85
Hs
Ht
A
L
W
Drawing office
2.15mHeight from the workplane (m)
0Suspension Height(m)
3.5mTotal Height (m)
50m 2Room Area (m 2)
10mRoom Length (m)
5mRoom Width (m)
Project
British Zonal Method (BZ)
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British Zonal Method (BZ)
Lighting Calculation Sheet
Uf (table 1-13)
n
f (table 1-7)
w ( table 1-7)
c (table 1-6)
Utilization Factor
Lamp number in theunit
Flour Reflection Factor
Wall Reflection Factor
0.7Ceiling ReflectionFactor
1.55
Room Index
( )r
m
LWK
H L W
British Zonal Method (BZ)
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British Zonal Method (BZ)
Reflection Factor values according to color
British Zonal Method (BZ)
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British Zonal Method (BZ)
Lighting Calculation Sheet
Uf (table 1-13)
n
f (table 1-7)
w ( table 1-7)
c (table 1-6)
Utilization Factor
Lamp number in theunit
0.2Flour Reflection Factor
0.3Wall Reflection Factor
0.7Ceiling ReflectionFactor
1.55
Room Index
( )r
m
LWK
H L W
British Zonal Method (BZ)
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British Zonal Method (BZ)
Reflection Factor values according to material
British Zonal Method (BZ)
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British Zonal Method (BZ)
Lighting Calculation Sheet
Uf (table 1-13)
n
f (table 1-7)
w ( table 1-7)
c (table 1-6)
0.47Utilization Factor
2Lamp number in theunit
0.2Flour Reflection Factor
0.3Wall Reflection Factor
0.7Ceiling ReflectionFactor
1.55
Room Index
( )r
m
LWK
H L W
British Zonal Method (BZ)
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British Zonal Method (BZ)
Technical Data for General Lighting Units (C type)
British Zonal Method (BZ)
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British Zonal Method (BZ)
Lighting Calculation Sheet
Power and Type of Lamp
E(table 1-23)
(table 1-17)
K(table 1-13)
F(table 1-8)
Number of calculated LightingUnits
Required Illuminance Flux(Lux)
Lamp Luminous Flux (Lm)
Red. Factor
1.33Depreciation Factor
f
EAFN
nU K
British Zonal Method (BZ)
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British Zonal Method (BZ)
Depreciation Factor: ( w = 0.3)
British Zonal Method (BZ)
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British Zonal Method (BZ)
Lighting Calculation Sheet
Power and Type of Lamp
E ( table 1-23)
(table 1-17)
K (table 1-13)
F (table 1-8)
Number of calculated LightingUnits
Required Illuminance Flux(Lux)
Lamp Luminous Flux (Lm)
1Red. Factor
1.33Depreciation Factor
f
EAFN
nU K
British Zonal Method (BZ)
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( )
Technical Data for General Lighting Units (C type)
British Zonal Method (BZ)
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( )
Lighting Calculation Sheet
Fluorescent40W
Power and Type of Lamp
E ( table 1-23)
(table 1-17)
K (table 1-13)
F (table 1-8)
Number of calculated LightingUnits
Required Illuminance Flux
(Lux)
3000LmLamp Luminous Flux (Lm)
1Red. Factor
1.33Depreciation Factor
f
EAFN
nU K
British Zonal Method (BZ)
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( )
Luminous Flux ( ) for Different lighting units
British Zonal Method (BZ)
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( )
Lighting Calculation Sheet
Fluorescent40W
Power and Type of Lamp
E ( table 1-23)
(table 1-17)
K (table 1-13)
F (table 1-8)
11.8 12Number of calculated LightingUnits
500LuxRequired Illuminance Flux
(Lux)
3000LmLamp Luminous Flux (Lm)
1Red. Factor
1.33Depreciation Factor
f
EAFN
nU K
Required Illuminance for Different Places
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Required Illuminance for Different Places
British Zonal Method (BZ)
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Lighting Calculation Sheet
4.89 6
Longitudinal LightingUnit Number
E2=448 luxCalculated Illuminance
Flux (Lux)
0.59Calculated S/Hm Ratio
2.4 2
Cross Lighting UnitNumber
L
WNN
W
/ mm
S AH
H N
.f
e
N nU KE
A F
L
LNN
W