the act of illuminating or the state of being illuminated. a source of light, oftenly a light or lights, esp coloured lights, used as decoration in streets, parks, etc.

1. ILLUMINATION
• DAYLIGHT AND ARTIFICIAL LIGHT
• LAMPS : TYPES OF LAMPS, TYPES OF LIGHTING SYSTEM
• DESIGN CRITERIA : GEOMETRY AND QUALITY CRITERIA

2. DAYLIGHT
EFFICIENT USE OF NATURAL LIGHT

3. DAYLIGHT
EFFICIENT USE OF NATURAL LIGHT THROUGH SKYLIGHT
WITH GLASS BLOCKS

4. ARTIFICIAL LIGHT
COMMERCIAL SPACE WITH GENERAL, DIRECTIONAL AND
DIFFUSED LIGHTS

5. ARTIFICIAL LIGHT
COMMERCIAL SPACE WITH GENERAL, DIRECTIONAL AND
DIFFUSED LIGHTS

6. • DAYLIGHT
• Glare, sparking, subdued and hazy
• Depends on size, orientation and placement of
window
• ARTIFICIAL LIGHT
• Static and unchanged
• Brightness can be manipulated by dimmers
DAYLIGHT VS ARTIFICIAL LIGHT

7. “HOW AN OBJECT IS SEEN IS INFLUENCED BY LIGHT”
Luminous objects ( sun, stars and lamps) are visible because of the light they generate.
The objects are visible because of the light that is reflected from the surfaces of objects.
The ability to SEE WELL– ie
• To discern the shape
• Color
• Texture
• Differentiate one object from another
is affected by the AMOUNT OF LIGHT AVAILABLE FOR ILLUMINATION
BRIGHTNESS
CONTRAST
GLARE
DIFFUSION and
COLOR
LIGHTING

8. • It refers to how much light energy
is reflected by a surface
• Degree of brightness depends
upon the
• color,
• value and
• texture of surface
• A shiny, light colored surface will
reflect more light than a dark,
matt or rough textured surface.
BRIGHTNESS

9. • Contrast between an object and its
background helps in visual tasks to
discriminate object shape and profile
• Our eye adjusts to the average brightness
of a scene (prefers even lighting, can
respond to brightness ratios from 2:1 to
100:1)
• A maximum brightness ratio of 3:1 to 5:1
between the task surface and background
is recommended
• Higher brightness ratio leads to GLARE
CONTRAST

10. • Glare results when the
the level of contrasting
brightness increases
• Direct glare : by the light
source
• Indirect glare or veiling
glare: by reflecting
surfaces
GLARE

11. • Lamp consists of :
• Fitting and
• lamp
ELECTRICAL LIGHT SOURCE : LAMP

12. • Incandescent lamp, florescent lamp and high intensity discharge lamp, fiber
optics and LED
TYPES OF LAMPS

16. • An integral part of an electrical
system
• It requires a power point, a
housing assembly and a lamp
• Form and shape of fixture and
illumination is considered
• A point source gives focus
• A linear source gives direction
• Volumetric source
TYPES OF LIGHT FIXTURES

17. • Design of lighting system and pattern of
light radiated by the source should be in
harmony with the architectural features
of the space
• It should be in a rhythm
• Even distribution of illumination is
preferred by human eye
• AMBIENT LIGHT : shadow less uniform
light
• FOCUS LIGHT : focus on the task, gives
more contrast
• SPARKLE LIGHT : used in chandeliers,
TYPES OF LIGHTING

20. INDOOR LIGHTING

21. • Spacing of light from
each other and wall
depends on height
LIGHTING LAYOUT

22. A good lighting design must
satisfy functional and ergonomics
requirement considering cost
effectiveness. Depends on
• Lighting level
• Light direction
• Glare limitation
• Distribution of luminance
• Color of light and color
rendering
QUALITY OF LIGHT

23. • Luminous flux (F) : The radiated power perceived by eye
• Luminous intensity (I) : The Luminous Flux radiated per solid angle in a defined
direction
• Luminous intensity direction curve LIDC : Luminous intensity in all direction of
radiation gives it distribution. It determines the radiation of lamp as narrow,
medium or wide beam and as symmetrical or non symmetrical.
• Illuminance (E) : Luminous flux radiating per unit area
Optimal for seeing is 2000 lx
Global radiation (clear sky) is 100000 lx
• Luminance (L) : measure of perceived brightness
TERMS