Lumen per Square Foot to Watt per Square Centimeter (at 555 nm) Conversion
Convert between Lumen per Square Foot and Watt per Square Centimeter (at 555 nm) quickly and accurately.
How to Convert Lumen per Square Foot to Watt per Square Centimeter (at 555 nm)
Conversion Formula
Example
Convert 15 lm/ft² to W/cm² (at 555 nm):
Unit Information
Learn about the illumination units you're converting between
Lumen per Square Foot
lm/ft²
Definition
The Lumen per Square Foot is an imperial unit of illuminance equal to approximately 10.76 lux, representing the luminous flux per square foot. It is commonly used in countries employing the imperial system for lighting design and illuminance measurements.
History/Origin
Developed in countries using imperial units as a practical measure of illuminance. It provides a familiar reference for lighting professionals working with imperial measurements and is commonly used in architectural lighting and building design.
Current Use
Widely used in the United States and other imperial-system countries for lighting design, architectural applications, and general illuminance measurements. It provides a practical unit for lighting professionals and is commonly referenced in building codes and lighting standards.
Multiplier
10.764
Offset
0
Watt per Square Centimeter (at 555 nm)
W/cm² (at 555 nm)
Definition
The Watt per Square Centimeter (at 555 nm) is a unit of spectral irradiance that can be converted to illuminance at the peak sensitivity wavelength of the human eye. It represents the radiant power per unit area at 555 nm, weighted by the luminous efficacy of radiation.
History/Origin
Developed for converting between radiometric and photometric quantities at the peak sensitivity wavelength of human vision. It provides a bridge between physical light measurements and perceived brightness, using the luminous efficacy of 683 lumens per watt at 555 nm.
Current Use
Used in optical engineering, laser technology, and display characterization where the relationship between radiant power and perceived brightness is important. It allows for precise conversion from physical measurements to photometric quantities for monochromatic light sources.
Multiplier
6830000
Offset
0
Lumen per Square Foot to Watt per Square Centimeter (at 555 nm) Conversion Table
| Lumen per Square Foot [lm/ft²] | Watt per Square Centimeter (at 555 nm) [W/cm² (at 555 nm)] |
|---|---|
| 1 lm/ft² | 0.000002 W/cm² (at 555 nm) |
| 10 lm/ft² | 0.000016 W/cm² (at 555 nm) |
| 25 lm/ft² | 0.000039 W/cm² (at 555 nm) |
| 50 lm/ft² | 0.000079 W/cm² (at 555 nm) |
| 100 lm/ft² | 0.000158 W/cm² (at 555 nm) |
| 0 lm/ft² | 0E+0 W/cm² (at 555 nm) |
| -10 lm/ft² | -0.000016 W/cm² (at 555 nm) |
| -40 lm/ft² | -0.000063 W/cm² (at 555 nm) |
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