What Is This Tool?
This converter transforms illumination values measured in lumen per square centimeter to centimeter-candle, a legacy unit once used to express illuminance near point light sources. It supports accurate comparison between contemporary and historical lighting data.
How to Use This Tool?
-
Input the illuminance value in lumen per square centimeter.
-
Select lumen/square centimeter as the starting unit.
-
Choose centimeter-candle [cm*c] as the target unit.
-
Submit to receive the converted illumination value instantly.
Key Features
-
Direct conversion between lumen/square centimeter and centimeter-candle using a simple 1:1 ratio.
-
Suitable for precise photometric measurements involving small LEDs, microscope slides, and optical components.
-
Supports analysis and interpretation of historical illumination data in obsolete units.
-
Browser-based and easy to use without installation.
Examples
-
Convert 5 lumen/square centimeters to 5 centimeter-candles [cm*c].
-
Convert 0.2 lumen/square centimeters to 0.2 centimeter-candles [cm*c].
Common Use Cases
-
Comparing high-intensity LED brightness per cm² in modern research.
-
Interpreting illuminance data from microscope slides or sensor surfaces in labs.
-
Analyzing or converting older photometric reports using candle-based units.
-
Preserving historical photographic lighting specifications.
Tips & Best Practices
-
Prefer SI units like lux for current lighting measurements.
-
Use this conversion to maintain continuity when referencing legacy data.
-
Be aware of the unit's assumption of a point source one centimetre away.
-
Apply this tool for scientific and calibration tasks involving small-scale illuminance.
Limitations
-
Centimeter-candle is an outdated unit and is not widely recognized today.
-
The unit is based on an idealized point source at a fixed distance, which may not reflect real-world conditions.
-
Modern applications should use SI units like lux wherever possible.
-
Conversion is mainly important for dealing with legacy or historical photometric data.
Frequently Asked Questions
-
What is lumen per square centimeter?
-
It is a measure of illuminance indicating luminous flux per square centimeter, weighted according to human eye sensitivity.
-
Why convert to centimeter-candle?
-
Conversion helps interpret historical lighting data and maintain compatibility with older photometric standards using candle-based units.
-
Is the centimeter-candle still used today?
-
No, it is an obsolete unit mostly replaced by the SI unit lux, but it remains useful for legacy data and historical references.
Key Terminology
-
Lumen/square centimeter
-
A unit of illuminance representing luminous flux per square centimeter, weighted by human eye response.
-
Centimeter-candle [cm*c]
-
An obsolete illuminance unit based on illumination one centimetre from a one-candle point source.
-
Lux
-
The SI unit of illuminance, measuring luminous flux per square meter.