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| Symbol: | lm |
| Category: | Luminous flux |
| SI Equivalent: | 1 cd-sr |
| Dimension: | JW |
| System: | SI |
| Notes | |
| Lumen is a unit of luminous flux which is equal to the amount of light streaming out through 1 steradian from a point source with a uniform intensity of 1 candela. | |
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