Convert Picolumens to Lumens
Convert Picolumens (plm) to Lumens (lm) instantly and accurately.
Conversion Formula
lm = plm × 1.000000000e-12
About Picolumens
The picolumen (plm) equals 10⁻¹² lm. A sub-unit used only in precision optical metrology and photomultiplier calibration chains. Equivalent to the photometric output of a 555 nm monochromatic source radiating approximately 1.46 fW of radiant power. Below the sensitivity threshold of most photometric instruments without special cooling. 1 plm = 10⁻¹² lm.
About Lumens
The lumen (lm) is the SI derived unit of luminous flux, equal to 1 cd·sr. A standard wax candle emits approximately 12 lm total; a 40 W incandescent bulb about 450 lm; the common 800 lm LED lamp is the direct replacement for a 60 W incandescent. Defined since 2019 SI by fixing K_cd = 683 lm/W at 540 THz. 1 lm = 1 cd·sr.
Quick Reference Table
| Picolumens (plm) | Lumens (lm) |
|---|---|
| 1 plm | 1 × 10-12 lm |
| 2 plm | 2 × 10-12 lm |
| 5 plm | 5 × 10-12 lm |
| 10 plm | 1 × 10-11 lm |
| 25 plm | 2.5 × 10-11 lm |
| 50 plm | 5 × 10-11 lm |
| 100 plm | 1 × 10-10 lm |