Light colour and intensity
2 0 0 0 K
2 2 0 0 K
5 7 0 - 5 9 0 n m
4 5 0 - 4 7 5 n m
5 9 0 - 6 2 0 n m
2 2 0 0 K
2 7 0 0 K
2 7 0 0 K
3 0 0 0 K
3 0 0 0 K
4 0 0 0 K
4 0 0 0 K
5 0 0 0 K
6 5 0 0 K
5 0 0 0 K
DAILY SOLAR CYCLE
MONTHLY LUNAR CYCLE
1 0 0 . 0 0 0
M E L A N O P S I N
C O N E S
R O D S
D I R E C T S U S N S H I N E
L I G H T I N T E N S I T Y
( L U X )
P H O T O R E C E P T O R S
I N T H E H U M A N E Y E
D A Y L I G H T
D A Y L I G H T
V E R Y D A R K D A Y
T W I L I G H T
D E E P T W I L I G H T
F U L L M O O N
Q U A R T E R M O O N
S T A R L I G H T
O V E R C A S T N I G H T
1 0 . 0 0 0
1 0 0 0
1 0 0
1 0
1
0 , 1
0 , 0 1
0 , 0 0 1
0 , 0 0 0 1
DAY
NIGHT
Source: National Optical Astronomy Observatory
33
04
03
02
01
L I G H T & W E L L - B E I N G
