1400 Lumens to Lux – Answer with Formula

1400 lumens converted to lux depends on the area over which the light is spread. Assuming the light is evenly spread over 1 square meter, 1400 lumens equals 1400 lux.

Lux measures illuminance, which is lumens per square meter. So, for direct conversion, lux = lumens ÷ area in square meters. Without area, lumens cannot convert solely to lux, but under 1 m², 1400 lumens = 1400 lux.

Conversion Tool

Conversion Formula

The formula to convert lumens (lm) to lux (lx) is:

lux = lumens ÷ area (m²)

This works because lumens measure total light output, while lux measures light intensity over an area. When you divide total light by the surface area it covers, you get illuminance in lux.

Example:

• If a light emits 1400 lumens and covers 2 m², then lux = 1400 ÷ 2 = 700 lx.
• If the same 1400 lumens spreads over 0.5 m², lux = 1400 ÷ 0.5 = 2800 lx.

Conversion Example

• Convert 1200 lumens to lux over 1.5 m²:
  • Divide 1200 by 1.5
  • 1200 ÷ 1.5 = 800 lux
  • Result: 800 lx
• Convert 1600 lumens to lux over 2 m²:
  • Divide 1600 by 2
  • 1600 ÷ 2 = 800 lux
  • Result: 800 lx
• Convert 1000 lumens to lux over 0.8 m²:
  • Divide 1000 by 0.8
  • 1000 ÷ 0.8 = 1250 lux
  • Result: 1250 lx
• Convert 1800 lumens to lux over 3 m²:
  • Divide 1800 by 3
  • 1800 ÷ 3 = 600 lux
  • Result: 600 lx

Conversion Chart

This chart shows lumens values and their equivalent lux if light spreads on 1 square meter. To use it, find the lumens value and read across for the lux, assuming the area stays 1 m². Changing the area changes lux accordingly.

Related Conversion Questions

• How many lux does 1400 lumens produce on a 2 square meter surface?
• What is the lux value of 1400 lumens over 0.5 m²?
• Can 1400 lumens equal 1400 lux always?
• How to convert 1400 lumens to lux with different area sizes?
• Is 1400 lumens bright enough for office lighting in lux?
• What area is needed for 1400 lumens to equal 500 lux?
• How does distance affect lux when starting from 1400 lumens?

Conversion Definitions

Lumens: Lumens measure the total amount of visible light emitted by a source, representing its brightness as perceived by the human eye. It quantifies light output without considering direction or area. More lumens means brighter light source.

Lux: Lux measures illuminance, or how much luminous flux falls on a surface area one square meter. It shows light intensity perceived on surfaces. One lux equals one lumen per square meter, and varies with light spread and distance.

Conversion FAQs

Does the area have to be exactly 1 square meter to convert lumens to lux?

No, lux depends on how the light spreads over a surface. If the area changes, lux changes inversely. You divide lumens by the actual area to get lux, so 1 square meter is just a common reference, not a requirement.

Can lux be higher than lumens?

Lux can’t be higher than lumens in absolute terms because lux divides lumens by area. But small area means higher lux (intensity), so lux values can exceed lumens numerically if area is less than 1 m².

Why does distance affect lux but not lumens?

Lumens measure total light output regardless of distance. Lux, however, considers how light spreads over an area, which grows larger with distance. So increasing distance lowers lux, while lumens stay constant.

Can I convert lumens to lux without knowing the area?

No, area is essential to convert lumens to lux because lux measures light per unit area. Without knowing the surface size the light covers, conversion can’t be accurately done.

Are lumens and lux measurements affected by light color?

Both lumens and lux are weighted by human eye sensitivity, which varies by color. Lumens account for this in total output measurement, while lux measures perceived illuminance, so color affects perception but the math conversion stays same.