LI-COR LI-250, Instruction Manual

Page: 16 / 19

B-1
Appendix B. Conversion Table
Type of
Measurement Instantaneous Measurements
Quantum 1.0
µ
m s
-1
m
-2
= 1
µ
E s
-1
m
-2
= 6.022 • 10
17
photons s
-1
m
-2
= 6.022
•
10
17
quanta s
-1
m
-2
= 6.022
•
10
13
quanta s
-1
cm-
2
Radiometric 1 W m
-2
= 1.433 •
10
-3
cal cm
-2
min
-1
= 1.433
•
10
-3
langley min
-1
= 0.100 mW cm
-2
= 100
µ
W cm
-2
= 1.0 J s
-1
m
-2
= 1000 erg s
-1
cm
-2
= 0.317 BTU ft
-2
h
-1
= 5.283
•
10
-3
BTU ft
-2
min
-1
Photometric 1 lux = 1 lm m
-2
= 0.0929 lm ft
-2
= 0.0929 fc
= 0.001 klux