Axis

Illuminance

photph

The CGS unit of illuminance: 1 lm/cm².

Dimension
J/L⁻²
Canonical signature
L^-2*J
System
metric historical
Exactness
Exact

Definition record

How this unit is defined

Canonical base
1 ph = 10,000 lx
Conversion type
linear
Aliases
phots

Same dimension

Related units

luxsilxcandela per square metresicd/m²quettaluxsiQlxronnaluxsiRlxyottaluxsiYlxzettaluxsiZlxexaluxsiElxpetaluxsiPlx

Common conversions

Every conversion routes through the canonical base of the dimension.

1 ph = 10,000 lx

Exact relationship

10 ph = 100,000 lx

Exact relationship