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The conversion of 1500 lux to lumens depends on the area over which the light is spread. Assuming an area of 1 square meter, 1500 lux equals 1500 lumens.
Lux measures illuminance, or how much light hits a surface, while lumens measure total light output. So, to get lumens from lux, multiply lux by the area in square meters illuminated. Without knowing the area, the conversion can’t be exact.
Table of Contents
Conversion Tool
Result in lumens:
Conversion Formula
Lux (lx) is the measure of illuminance, which is light intensity over a surface area. Lumens (lm) measure the total light output from a source. The formula connecting the two is:
Lumens = Lux × Area (in square meters)
This works because lux tells how many lumens fall on each square meter. So multiplying by the total area gives total lumens.
Example: If a surface of 2 m² is illuminated with 1500 lux, the total lumens are:
- Lux = 1500
- Area = 2 m²
- Lumens = 1500 × 2 = 3000 lm
Conversion Example
- Convert 1200 lux over 1.5 m²:
- Multiply lux by area: 1200 × 1.5 = 1800 lumens
- So total light output hitting that surface is 1800 lumens.
- Convert 2000 lux over 0.8 m²:
- 2000 × 0.8 = 1600 lumens
- This shows, less area means fewer lumens for the same lux.
- Convert 1000 lux over 3 m²:
- 1000 × 3 = 3000 lumens
- More area with fixed lux yields higher total lumens.
Conversion Chart
| Lux | Lumens (Area = 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, converted to lumens assuming the area is 1 square meter. To find lumens for other areas, multiply the lumens here by the surface area in square meters.
Related Conversion Questions
- How many lumens are in 1500 lux over 2 square meters?
- What area is needed for 1500 lux to equal 3000 lumens?
- Is 1500 lux equal to 1500 lumens on any surface?
- How does changing the surface area affect converting 1500 lux to lumens?
- Can I convert 1500 lux to lumens without knowing the area?
- What’s the difference between 1500 lux and 1500 lumens?
- If I double the area, how does that affect lumens from 1500 lux?
Conversion Definitions
Lux: Lux is a unit measuring illuminance, which is the amount of light falling on a surface per unit area. One lux equals one lumen per square meter. It describes how bright a surface appears under light, accounting for both intensity and area illuminated.
Lumens: Lumens quantify total visible light emitted by a source. It measures the brightness perceived by the human eye, independent of distance or area. Higher lumens means a light source emits more visible light energy in all directions.
Conversion FAQs
Why can’t I convert lux to lumens without knowing the area?
Because lux measures light intensity per unit area, you have to multiply by the actual area to get total lumens. Without knowing the surface size, conversion can’t be accurate. Lux alone doesn’t give total light output.
Does changing the distance from the light source affect lux or lumens?
Distance changes lux because illuminance decreases over larger distances as light spreads out. Lumens remain constant since total light output from the source doesn’t change. So lux varies with distance, but lumens do not.
Can lumens be higher than lux for the same light source?
Lumens measure total light output, lux measures light intensity on a surface. If the area illuminated is small, lux can be higher numerically than lumens, but lumens cover total light emitted. They measure different properties.
How does surface reflectivity affect the conversion?
Reflectivity affects how much light bounces off surfaces and thus perceived illuminance. But the raw conversion from lux to lumens depends on direct incident light and area, ignoring surface reflection, so reflectivity doesn’t change the mathematical conversion.
Is the formula Lumens = Lux × Area valid for all lighting conditions?
It’s valid when measuring uniform illuminance over a flat surface. For uneven lighting or 3D spaces, more complex calculations needed. The formula simplifies conversion assuming consistent lux across the measured area.
