E E E 0 5 L i g h t B l e n d i n g f o r D i f f e r e n t F e - - PowerPoint PPT Presentation

E E E 0 5 L i g h t B l e n d i n g f o r D i f f e r e n t F e e l i n g

V i c t o r i a a n d M e n g K e

01

Introducti

• n

02

Methodology

03

Data Representation and Analysis

04

Conclusion

Pr Presentation esentation Ou Outl tline ine

2

What is Artificial Lighting?

Artificial light, as

• pposed

to natural light, refers to any light source that is produced by electrical means. Humans have been exposed to artificial lighting since the 1880s, but they have not fully adapted to it.

L o w e r e d P r o d u c t i v i t y H e a l t h p r o b l e m s P o o r e r S l e e p Q u a l i t y

Poor Circadian Rhythm

Pro roblems blems fr from

• m Artifi

rtifici cial al Li Lighting ghting

Pro roblems blems fr from

• m Artifi

rtifici cial al Li Lighting ghting

Source: https://www.andrewjensen.net/how-office-lighting- affects-productivity/

Pro roblems blems fr from

• m Artifi

rtifici cial al Li Lighting ghting

Source: https://sleepswag.com/artificial-light-affects- sleep/

Pr Project

• ject Ai

Aim

• As

artificial lighting is widely used for its purposes, it would be unrealistic to eradicate artificial light totally.

• Instead,
• ur

project aims to minimize the impacts

• f

artificial lighting.

So Solution lution

• Create a light bulb that changes

its color temperature with the variation with the sun

• The

higher the color temperature, the ‘whiter’ the light

• The

lower the color temperature, the ‘warmer’

• r

more yellowish the light will be

Methodology

Device

CL CL-500A Illuminance Spectrophotometer (CIS)

I t i s u s e d f o r t h e e v a l u a t i o n o f l i g h t a n d i t c a n m e a s u r e i l l u m i n a n c e , c o l o u r t e m p e r a t u r e , C o l o u r R e n d e r i n g I n d e x ( C R I ) , c h r o m a t i c i t y , a n d s p e c t r a l p o w e r d i s t r i b u t i o n .

Device

Device

03

STEP

02

STEP

01

STEP

M e a s u r e C o l o r Te m p e r a t u r e o f S u n l i g h t M e a s u r e C o l o r Te m p e r a t u r e o f Ar t i f i c i a l L i g h t s C o m p a r e R e s u l t s

03

STEP

02

STEP

01

STEP

Measure Color Temperature of Sunlight

• 9 a m –

6 . 3 0 p m

• A t a n i n t e r v a l o f

3 0 m i n s

• T h r e e d i f f e r e n t

l o c a t i o n s

02

STEP

Measure Color Temperature of Artificial Lights

03

STEP

01

STEP

03

STEP

Compare Results

01

STEP

02

STEP

Data Representation and Analysis

S u n l i g h t

S u n l i g h t

5082 5552 5765 5863 6272 6461 6437 6570 6765 6403 6274 5981 6091 5905 5857 5580 5210 5183 4594 4559

3000 3500 4000 4500 5000 5500 6000 6500 7000 900 930 100010301100113012001230130013301400143015001530160016301700173018001830 Color Temperature Time of Day

Graph of Color Temperature for Sunlight

Sunlight

A r t i f i c i a l L i g h t

A r t i f i c i a l L i g h t

5082 5552 5765 5863 6272 6461 6437 6570 6765 6403 6274 5981 6091 5905 5857 5580 5210 5183 4594 4559 2968 3452 3884 3980 4049 4616 5172 5439 5898 5439 5172 4616 4049 3980 3884 3828 3452 2968 2858 2709

1000 2000 3000 4000 5000 6000 7000 8000 900 930 1000 1030 1100 1130 1200 1230 1300 1330 1400 1430 1500 1530 1600 1630 1700 1730 1800 1830 Color Temperature Time of Day

Graph of Color Temperature for Sunlight and LED light

Sunlight LED light

Analysis

• Colour temperatures of sunlight are measured on sunny

days and they can be even higher on cloudy or rainy days

• Artificial lights available in the market can only mimic

sunlight in terms of trend instead of the exact values

• The colour temperatures of artificial lights are

consistently lower than those of sunlight

Conclusion

EAKNESSES

TRENGHS

Extensions to This Project

• A d d i n o t h e r

p a r a m e t e r s o f l i g h t t o i m p r o v e t h e u s e f u l n e s s a n d p r a c t i c a l i t y o f t h e l i g h t b u l b s .

Aspirations for This Project

• A i d o t h e r f u t u r e

p r o j e c t s i n c r e a t i n g m o r e s u s t a i n a b l e a r t i f i c i a l l i g h t i n g f o r o u r d a i l y l i v e s

• S u c h l i g h t b u l b s t o

b e u s e d i n o f f i c e s a n d w o r k p l a c e s

• A l l o w p e o p l e t o l e a r n

a b o u t t h e u n f o r e s e e n d a n g e r s o f a r t i f i c i a l l i g h t i n g

Thank You