Lumen

Measurement units: luminous flux
Symbol: lm

symbol: lm

The lumen is the unit of luminous flux, a measure of the total quantity of visible light emitted by a source per unit of time.

The lumen is defined in relation to the candela as

1 lm = 1 cd·sr.

1 cd × 4π sr = 4π cd⋅sr ≈ 12.57 lm.

1 lumen lm = 1*1.000000000 lux per square meter lx m²
1 lumen lm = 1*0.050000000 watt halogen bulb Wbh
1 lumen lm = 1*1.000000000 candelas steradians cd sr
1 lumen lm = 1*0.0090909090909091 watt fluorescent tube Wft
1 lumen lm = 1*0.100000000 watt incandescent bulb Wb

Lumens to lux per square meter

Lumens to watt halogen bulb

Lumens to candelas steradians

Lumens to watt fluorescent tube

Lumens to watt incandescent bulb

Lumens to watt led bulb

	luminous flux
measurement units
Candela steradian Lumen Lux per square meter Watt fluorescent tube (neon tube) Watt halogen bulb Watt incandescent bulb Watt led bulb