Lumenor flux :
Amount of light emitted by lumenor source in one second is called Lumenor flux.
It's units is Lumen
(Or)
The light energy given out by light is called Lumenor flux.
Lumen :-
Lumen is the SI unit of lumenor flux
1 lumen = 10.57×candle power
Lux :-
Number of lumens required per square meter.
Elumination :-
The density of light flow (or) insident on a surface is called Elumination.
Elumination = lumen flux÷ Area
Room Index :-
It is define as the ratio of length, width and height.
Room Index = RI= L×W÷ (L+W)×H
( L-length, W-width, H-height).
All dimensions should be in meters.
Room Index is Calculate for CUF
CUF - Co-efficient of Utilizes factor.
(It is on the catlog of company)
Reflection factor : Wall, Ceiling, Floor etc.
Fixtures :
Fixtures is a place were we use to install light unit.
Number of fixtures = [L×W×Lu×Level]÷[ CUF×M.F×Total lumen×Type of fixtures].
( Type of fixtures = lighting points)
M.F(Maintenance Factor) :-
Maintenance factor is depends on three things,
1) Initial lumen
2) Average lumen
3) Environment :- a) Neat
b) Normal
c) Untidy
Neat :- AC room - 0.8
Non-AC (Bed room,Hall) - 0.7
Normal :- Kitchen - 0.6
Dirty / Untidy :- Store room - 0.5
Types of Lamp :
LAMP Rating(W) LU/Watt
1)Incandescent 10,16,18,40,40 8-20
Lamp. 60,100,200W
2)Flurance 11,14,18,28,36 60-40
Lamp 40,54W
3)Compact 4,9,11,13,14, 55-60
Flurancent 18,25,36,40
Lamp. 45,80W
4)Light emitting - 80
Diode(external)
5) Sodium Vrap 70,100,150 80-110
Lamp (SVL) 250,400W
6) Mercury Vrap 40,60,80,100 45-65
Lamp(MVL) 125,150,250W
7) Metal hallogen 70,100,125 70-90
Lamp(MHL) 250,400W
Standard LUX LEVEL for RESIDENTIAL purpose :-
Entrance hall 300Lux
Master bedroom 250lux
Bedroom 200lux
Dinning hall 200lux
Kitchen 300lux
Total/Bathroom 150lux
Corridor/parking/lobby 100lux
Prayer room 200lux
Standard LUX LEVEL for COMMERCIAL purpose :-
General shop 300lux
Shopping mall 750lux
Indoor station 800lux
Outdoor station 2000lux
Bar & Restaurant 100lux
GYM/Bank/General ward 300lux
Class room/ATM/LAB 400 lux
Seminar hall/ICU 500lux
Supermarkets/Function hall 600lux
Operation theater 600lux
Electrical room 200 lux
Work shop 500lux
Figure :
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