Luminous Flux Converter
Convert luminous flux (the total light output of a source) between lumens, kilolumens, candela-steradians and spherical candlepower.
1 lumen = 0.001 kilolumens
Most used luminous flux units
Popular luminous flux conversions
- Lumens to candela-steradians 1 lm = 1 cd⋅sr
- Kilolumens to lumens 1 klm = 1,000 lm
- Spherical candlepower to lumens 1 scp = 12.56637 lm
What is luminous flux?
Luminous flux is the total visible light a source gives off, weighted by the sensitivity of the human eye. Its unit is the lumen, which is how light bulbs are rated. An old 60 W incandescent bulb gives about 800 lumens; an LED gives the same with about 8–9 W, because LEDs produce 100 or more lumens per watt.
Luminous flux units from smallest to largest
Every proportional luminous flux unit on the site, ordered by size and expressed in lumens.
- Millilumen 0.001 lm
- Lumen 1 lm
- Candela-steradian 1 lm
- Spherical candlepower 12.5664 lm
- Kilolumen 1,000 lm
All 5 luminous flux units
Units
Frequently asked questions
How many lumens is a 60 W bulb?
About 800 lumens, which an LED bulb provides with about 8–9 W.