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1500 lux is equal to 1500 lumens when measured over an area of 1 square meter. This means that if a surface of exactly 1 square meter receives 1500 lux, the total luminous flux hitting that area is 1500 lumens.
Lux and lumens are related but measure different things. Lux measures illuminance or how much light falls on a surface area, while lumens measure the total amount of visible light emitted by a source. To convert lux to lumens, you multiply lux by the area in square meters over which the light spreads.
Conversion Tool
Result in lumens:
Conversion Formula
The formula to convert lux to lumens depends on the surface area where the light is distributed. It is:
Lumens (lm) = Lux (lx) × Area (m²)
This works because lux measures luminous flux per unit area, so multiplying by area gives total luminous flux.
For example, if 1500 lux is shining on a 1 m² surface:
- Lux value = 1500 lx
- Area = 1 m²
- Lumens = 1500 × 1 = 1500 lm
If the area was 2 m², then lumens would be 1500 × 2 = 3000 lm.
Conversion Example
- Convert 1200 lux over 3 m²:
- Multiply 1200 lx by 3 m².
- 1200 × 3 = 3600 lumens.
- This means 3600 lumens of total light is hitting the 3 m² surface.
- Convert 2000 lux over 0.5 m²:
- 2000 × 0.5 = 1000 lumens.
- Half a square meter receiving 2000 lux equals 1000 lumens.
- Convert 500 lux over 4 m²:
- 500 × 4 = 2000 lumens.
- A larger area reduces lux but total lumens increases.
Conversion Chart
| Lux (lx) | Lumens (lm) for 1 m² |
|---|---|
| 1475.0 | 1475.0 |
| 1480.0 | 1480.0 |
| 1485.0 | 1485.0 |
| 1490.0 | 1490.0 |
| 1495.0 | 1495.0 |
| 1500.0 | 1500.0 |
| 1505.0 | 1505.0 |
| 1510.0 | 1510.0 |
| 1515.0 | 1515.0 |
| 1520.0 | 1520.0 |
| 1525.0 | 1525.0 |
This chart shows lux values from 1475 to 1525 and their equivalent lumens for an area of 1 square meter. You can read the lux value in first column and find lumens in the second. Perfect when you want quick reference conversion without calculator.
Related Conversion Questions
- How many lumens correspond to 1500 lux on a 2 m² surface?
- What is the difference between lux and lumens when measuring light intensity?
- Can 1500 lux be converted to lumens without knowing the area?
- How to convert 1500 lux to lumens for a room of 10 m²?
- Does the angle of light affect converting 1500 lux to lumens?
- If I have 1500 lux over 0.75 m², how many lumens is that?
- Why does 1500 lux equal 1500 lumens only with 1 square meter?
Conversion Definitions
Lux: Lux is a unit measuring illuminance, representing how much visible light hits a surface per square meter. It quantifies brightness as perceived by human eyes on a specific area, useful in lighting design, photography, and ensuring adequate lighting for tasks.
Lumens: Lumens measure total luminous flux emitted by a light source in all directions. It represents the total amount of visible light produced, helping to compare brightness of bulbs regardless of beam spread or distance.
Conversion FAQs
Is it possible to convert lux to lumens without knowing the surface area?
No, converting lux directly to lumens requires knowing the surface area the light is spread onto. Lux is lumens per square meter, so without area, the total lumens cannot be calculated. The same lux value across different areas results in different lumens.
Why does 1500 lux equal 1500 lumens only for 1 square meter?
Because lux is lumens per square meter, when area equals exactly 1 m², lux and lumens numbers are the same. If area increases or decreases, total lumens change proportionally, but lux remains constant per square meter.
Can the conversion change if the light source is angled?
Lux measurements can be affected by the angle of incidence, since light falling obliquely spreads over larger area, reducing lux. However, total lumens emitted by the source remain constant regardless of angle. Proper measurement requires accounting for angle effects.
How accurate is the conversion using the simple formula?
The formula assumes uniform light distribution over a flat surface and no light losses. In real environments, reflections, absorption, and non-uniformity can cause deviations. Still, the formula provides practical estimation for many lighting calculations.
What units should be used to measure area in this conversion?
Area must be in square meters (m²) to convert lux to lumens correctly, because lux is defined as lumens per square meter. Using other units like square feet requires conversion factors before applying the formula.
