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Luminous intensity & illuminance unitsgrouping · 28
Units of measure grouped by quantity kind: luminous intensity & illuminance.
Members (28)
| Label | Notation | UCUM code | Definition |
|---|---|---|---|
| candela per square metre | A24 | cd.m-2 | |
| lumen hour | B59 | lm.h | |
| lumen per square metre | B60 | lm.m-2 | |
| lumen per watt | B61 | lm.W-1 | |
| lumen second | B62 | lm.s | |
| one | C62 | | Synonym: unit |
| reciprocal square metre | C93 | /m2 | Synonym: reciprocal metre squared |
| reciprocal second | C97 | /s | |
| reciprocal second per metre squared | C99 | /(s1.m2) | |
| candela | CDL | cd | |
| reciprocal second per steradian | D1 | /(s.sr) | |
| reciprocal second per steradian metre squared | D2 | s-1.sr-1.m-2 | |
| watt per steradian | D57 | W.sr-1 | |
| kilolux | KLX | | A unit of illuminance equal to one thousand lux. |
| lumen | LUM | lm | |
| lux | LUX | lx | |
| lumen per square foot | P25 | lm.[ft_i]-2 | Derived SI unit lumen divided by the power of the unit foot according to the Anglo-American and Imperial system of units by exponent 2. |
| phot | P26 | ph | CGS (Centimetre-Gram-Second system) unit of the illuminance, defined as lumen by square centimetre. |
| footcandle | P27 | | Non SI conform traditional unit, defined as density of light which impinges on a surface which has a distance of one foot from a light source, which shines with an intensity of an international candle. |
| candela per square inch | P28 | cd.[in_i]-2 | SI base unit candela divided by the power of unit inch according to the Anglo-American and Imperial system of units by exponent 2. |
| footlambert | P29 | [ft-Lmb] | Unit of the luminance according to the Anglo-American system of units, defined as emitted or reflected luminance of a lm/ft². |
| lambert | P30 | Lmb | CGS (Centimetre-Gram-Second system) unit of luminance, defined as the emitted or reflected luminance by one lumen per square centimetre. |
| stilb | P31 | sb | CGS (Centimetre-Gram-Second system) unit of luminance, defined as emitted or reflected luminance by one lumen per square centimetre. |
| candela per square foot | P32 | cd.[ft_i]-2 | Base unit SI candela divided by the power of the unit foot according to the Anglo-American and Imperial system of units by exponent 2. |
| kilocandela | P33 | | 1000-fold of the SI base unit candela. |
| millicandela | P34 | | 0,001-fold of the SI base unit candela. |
| Hefner-Kerze | P35 | | Obsolete, non-legal unit of the power in Germany relating to DIN 1301-3:1979: 1 HK = 0,903 cd. |
| international candle | P36 | | Obsolete, non-legal unit of the power in Germany relating to DIN 1301-3:1979: 1 HK = 1,019 cd. |
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