Convert Candelas per square inch to Lamberts
Convert Candelas per square inch (cd/in²) to Lamberts (L) instantly and accurately.
Conversion Formula
L = cd/in² × 0.4869478352
About Candelas per square inch
The candela per square inch (cd/in²) equals 1/0.00064516 cd/m² ≈ 1 550 cd/m². Used in US LED and CRT datasheets when citing luminance of small emitter areas. A high-brightness packaged LED chip in a focussed-beam configuration can reach 1-20 cd/in². 1 cd/in² = 1/(0.0254²) cd/m².
About Lamberts
The lambert (L) equals 10⁴/π cd/m² ≈ 3 183 cd/m², the luminance of a perfect diffuse surface emitting 1 lumen per square centimetre. The CGS practical luminance unit. An incandescent lamp globe at 3 200 K has luminance ~1 L; a clear sky is ~0.94 L. Superseded by cd/m² in SI photometry. 1 L = 10⁴/π cd/m².
Quick Reference Table
| Candelas per square inch (cd/in²) | Lamberts (L) |
|---|---|
| 1 cd/in² | 0.486948 L |
| 2 cd/in² | 0.973896 L |
| 5 cd/in² | 2.43474 L |
| 10 cd/in² | 4.86948 L |
| 25 cd/in² | 12.1737 L |
| 50 cd/in² | 24.3474 L |
| 100 cd/in² | 48.6948 L |