lighting provided in building why lighting is used in building types of lighting building services natural lighting artificial lighting what is glare in room aim and objectives of lighting

1. GUJARAT TECHNOLOGICAL UNIVERSITY(GTU)
VALLABH BUDHI POLYTECHNIC, NAVSARI.(655)
DIPLOMA ENGINEERING
CIVIL ENGINREERING DEPARTMENT (06)
SUBJECT:BUILDING SERVICES (3360604)
SEMESTER:VI
CH:1 INTRODUCTION OF BUILDING SERVICES
MISS BHAVIKA H.PATEL

2. LIGHTING:
 Glare:(ગ્લેર )
1.Direct glare (ડાયરેક્ટ ગ્લેર)
2.Reflected glare(પરાવર્તિત ગ્લેર)
3. Veilling glare(વેલલિંગ ગ્લેર)

3. LIGHTING TERMINOLOGY:(વ્યાખ્યાઓ )
1.Luminous flux(ϕ) (લ્યુમીનસ ફ્લક્સ)
Luminous flux is often used as an objective or QUANTITY measure of the useful light emitted
by a light source, and is typically reported on the packaging for light bulbs.
2.Lumen (લ્યુમેન)
The SI unit of luminous flux is the lumen (lm).
3.Illuminance(E) (ઉજાશ)
illuminance is the total luminous flux incident on a surface, per unit area. It is a measure of
how much the incident light illuminates the surface.
4.Lux (લક્સ)
The lux (symbol: lx) is the SI derived unit of illuminance,

4. TYPES OF LIGHTING:
A)Natural lighting
B)Artificial lighting
A)Natural lighting
It depends on,
-Altitude of the sun
-Altitude of the locality
-The day of the year
-Time of the day
B)Artificial lighting

5. Natural lighting include one more important factor which is
Day light factor. કુદરતી લાઇટટિંગ નો એક મુખ્ય પટરબળ "ડે
લાઈટ ફેક્ટર" છે.
 Day light factor(DF)
1)Sky component(SC)
2)External reflected component(ERC)
3)Internal reflected component(IRC)