Spectral Luminous Efficacy Converter
Result:
Supported units
Convert between lumen per watt per nanometer (lm/W-nm) and lumen per watt per micrometer (lm/W-um). Exact relationships are used, including 1 lm/W-um = 1000 lm/W-nm.
Popular pairs
- lm/W-nm <-> lm/W-um
- lm/W-nm <-> lm/W-nm (precision check)
How to use
Pick your from/to units using the search boxes, enter a value, and the result updates instantly. Use the copy button to grab the output.
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Spectral Luminous Efficacy Converter FAQ
Are the conversions exact?
Yes. We use exact scaling between lm/W-nm and lm/W-um, including 1 lm/W-um = 1000 lm/W-nm.
Can I convert between lm/W-nm and lm/W-um?
Yes. Enter your value in lm/W-nm and select lm/W-um as the target (or vice versa); results update instantly as you type.
Does this handle very small or very large spectral luminous efficacy values?
Yes. You can convert down to narrowband nm values or up to um-scale values with high precision using Decimal arithmetic.