Lumen second
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Switch ph to lm·s
Lumen second Unit Table
A list of units symbol and data.
From lm·sTo phAll conversion
1 lm·s0.0001 ph
2 lm·s0.0002 ph
3 lm·s0.0003 ph
4 lm·s0.0004 ph
5 lm·s0.0005 ph
6 lm·s0.0006 ph
7 lm·s0.0007 ph
8 lm·s0.0008 ph
9 lm·s0.0009 ph
10 lm·s0.001 ph
Description

Lumen Second (lm·s): Measuring Luminous Energy

The lumen second, also known as the talbot, is a unit of luminous energy, representing the total amount of light emitted over a period of time. It is calculated by multiplying luminous flux (in lumens) by time (in seconds). This unit is useful in applications where the duration of light exposure is significant, such as in photography, lighting design, and vision science.

By quantifying the cumulative light output, the lumen second allows for the assessment of energy usage, exposure levels, and the effectiveness of lighting systems over time. This information is crucial for optimizing performance, ensuring safety, and enhancing energy efficiency in various contexts.

Phot (ph): CGS Unit of Illuminance

The phot is a unit of illuminance in the centimeter-gram-second (CGS) system, where one phot equals 10,000 lux. Although it is not commonly used in modern applications, the phot provides a historical reference point for high-intensity lighting measurements, particularly in scientific research and specialized fields.

While the SI unit lux has largely supplanted the phot, familiarity with this unit can be beneficial when interpreting older scientific literature or working within specific contexts where CGS units are still in use. Recognizing the conversion between phot and lux ensures accurate understanding and communication of illuminance values.

Complete list of conversion for Lumen second
Lumen second (lm·s)

1 Lumen second = 1 Candela

Convert 2 lm·s → cd

1 Lumen second = 1 Candlepower

Convert 2 lm·s → cp

1 Lumen second = 1 Lumen

Convert 2 lm·s → lm

1 Lumen second = 1 Lux

Convert 2 lm·s → lx

1 Lumen second = 0.09290312990644656 Footcandle

Convert 2 lm·s → fc

1 Lumen second = 0.0001 Phot

Convert 2 lm·s → ph

1 Lumen second = 1 Candela per square meter

Convert 2 lm·s → cd/m²

1 Lumen second = 1 Nit

Convert 2 lm·s → nt

1 Lumen second = 0.0001 Stilb

Convert 2 lm·s → sb

1 Lumen second = 0.0003141592653587727 Lambert

Convert 2 lm·s → L

1 Lumen second = 0.2918635079290997 Footlambert

Convert 2 lm·s → fL

1 Lumen second = 1 Lux second

Convert 2 lm·s → lx·s

1 Lumen second = 1 Rayleigh

Convert 2 lm·s → R