1400 lumens equals 1400 lux when the light is evenly spread over an area of 1 square meter.
Converting lumens to lux involves understanding that lumens measure total light output, while lux measures light intensity per unit area. When 1400 lumens of light hits exactly 1 square meter, the illumination is 1400 lux. If the area changes, lux value changes accordingly.
Conversion Tool
Result in lux:
Conversion Formula
The formula for converting lumens (lm) to lux (lx) depends on the area (A) over which the light is spread:
Lux (lx) = Lumens (lm) / Area (m²)
This means, the light’s intensity in lux is the total luminous flux divided by the surface area receiving the light. When the area is 1 square meter, lux equals lumens directly.
Example calculation for 1400 lumens over 1 m²:
- Lux = 1400 lm / 1 m²
- Lux = 1400 lx
Conversion Example
- Convert 700 lumens to lux over 0.5 m²:
- Lux = 700 lm / 0.5 m²
- Lux = 1400 lx
- Convert 2000 lumens to lux over 2 m²:
- Lux = 2000 lm / 2 m²
- Lux = 1000 lx
- Convert 500 lumens to lux over 0.25 m²:
- Lux = 500 lm / 0.25 m²
- Lux = 2000 lx
- Convert 1600 lumens to lux over 4 m²:
- Lux = 1600 lm / 4 m²
- Lux = 400 lx
Conversion Chart
| Lumens (lm) | Lux (lx) (over 1 m²) |
|---|---|
| 1375.0 | 1375.0 |
| 1380.0 | 1380.0 |
| 1385.0 | 1385.0 |
| 1390.0 | 1390.0 |
| 1395.0 | 1395.0 |
| 1400.0 | 1400.0 |
| 1405.0 | 1405.0 |
| 1410.0 | 1410.0 |
| 1415.0 | 1415.0 |
| 1420.0 | 1420.0 |
| 1425.0 | 1425.0 |
The chart shows lumens values aligned with their equivalent lux when lighting an area of exactly 1 square meter. To use, find the lumens value and read across to see the lux illumination.
Related Conversion Questions
- How many lux does 1400 lumens produce on a 2 square meter surface?
- What is the lux level if 1400 lumens spread over 0.5 m²?
- Is 1400 lumens equal to 1400 lux always?
- How do I convert 1400 lumens to lux in a room of 3 square meters?
- What lux value results from 1400 lumens lighting a 10 m² area?
- Can 1400 lumens give enough lux for reading light?
- How do changes in area affect converting 1400 lumens to lux?
Conversion Definitions
Lumens: Lumens measure the total quantity of visible light emitted by a source per unit of time. It quantifies brightness perceived by the human eye from a light source, disregarding direction or area illuminated. A higher lumen value means brighter light output.
Lux: Lux quantifies illuminance, indicating how much luminous flux hits a surface per unit area. One lux equals one lumen per square meter. It measures light intensity on surfaces, essential for assessing lighting conditions for tasks or environments.
Conversion FAQs
Does the size of the illuminated area always affect lux values?
Yes, lux depends on both lumens and area. If light spreads over a larger area, lux decreases since the same amount of light covers more surface. Conversely, concentrating lumens over smaller area increases lux. So, area size plays critical role in lux calculation.
Can I use lumens and lux interchangeably?
No, lumens and lux are related but different. Lumens describe total light output, lux describes light intensity per area. Without knowing area, converting between them accurately is not possible. They measure complementary but distinct lighting properties.
What happens if lumens spread unevenly over an area?
If light distribution is uneven, calculating lux by simple division becomes inaccurate. Lux measures average illuminance, so bright spots and shadows affect real lux. In such cases, detailed measurements or photometric data help determine actual lux levels.
Why is lux important for indoor lighting design?
Lux indicates how well a surface is lit, which affects visibility, comfort, and safety indoors. Different activities require different lux levels. Designers use lux values to choose appropriate lighting fixtures and layouts ensuring adequate illumination for tasks.
Is it possible to increase lux without changing lumens?
Yes, by reducing the lit area or focusing light using reflectors or lenses, lux increases for the same lumens. Concentrating light on smaller surfaces intensifies illumination, useful in spotlights or task lighting without increasing total light output.