300 lux corresponds to 3000 lumens if the illuminated surface area is 10 square meters.
Lux measures illuminance, or the amount of light falling on a surface per unit area, while lumens measure the total quantity of visible light emitted by a source. To convert lux to lumens, you multiply the lux value by the surface area in square meters over which the light is spread.
Conversion Tool
Result in lumens:
Conversion Formula
The formula to convert lux (lx) to lumens (lm) require knowing the surface area (A) illuminated, measured in square meters (m²). The relationship is:
Lumens (lm) = Lux (lx) × Area (m²)
Lux measures the light intensity per square meter, so multiplying it with the area gives total light output in lumens. For example, if a surface is illuminated with 300 lux and the area is 10 m²:
- Calculate lumens: 300 lx × 10 m² = 3000 lm
This works because lux is a measure of luminous flux density, and multiplying by area sums all the flux over that surface.
Conversion Example
- Convert 150 lux to lumens over 5 m²:
- Multiply lux by area: 150 × 5 = 750 lm
- This means the total light output on that surface is 750 lumens.
- Convert 500 lux to lumens for 8 m²:
- 500 × 8 = 4000 lm
- The total luminous flux hitting the surface is 4000 lumens.
- Convert 1000 lux to lumens for 2 m²:
- 1000 × 2 = 2000 lm
- Total light received on the area is 2000 lumens.
- Convert 250 lux to lumens for 12 m²:
- 250 × 12 = 3000 lm
- The surface area receives 3000 lumens in total.
- Convert 400 lux to lumens for 7.5 m²:
- 400 × 7.5 = 3000 lm
- The total light flux is 3000 lumens.
Conversion Chart
| Lux (lx) | Lumens (lm) (Area = 10 m²) |
|---|---|
| 275.0 | 2750.0 |
| 280.0 | 2800.0 |
| 285.0 | 2850.0 |
| 290.0 | 2900.0 |
| 295.0 | 2950.0 |
| 300.0 | 3000.0 |
| 305.0 | 3050.0 |
| 310.0 | 3100.0 |
| 315.0 | 3150.0 |
| 320.0 | 3200.0 |
| 325.0 | 3250.0 |
This chart shows the lumens values for lux values ranging between 275 and 325 on a 10 m² surface. To get lumens, multiply the lux by 10. Use this if you know the surface area is 10 m²; otherwise, adjust accordingly.
Related Conversion Questions
- How many lumens does 300 lux produce on a 15 square meter surface?
- What’s the difference between lux and lumens when lighting a room with 300 lux?
- Can 300 lux be directly converted to lumens without knowing the area?
- How to calculate lumens from 300 lux for an irregular surface?
- What lumens value corresponds to 300 lux in a 5 meter square area?
- Is 300 lux enough illumination for 1000 lumens output?
- How to convert 300 lux to lumens for outdoor lighting?
Conversion Definitions
Lux: Lux is the unit measuring illuminance, describing how much luminous flux falls on a surface per square meter. It quantifies brightness as perceived by the human eye, indicating how well an area is lit. One lux equals one lumen per square meter.
Lumens: Lumens measure the total amount of visible light emitted by a source per second. It represents the brightness of the light itself, independent of area or distance, showing how intense the light output is in all directions combined.
Conversion FAQs
Can I convert lux to lumens without knowing the surface area?
No, you can’t accurately convert lux to lumens without the surface area because lux measures light intensity per unit area. Lumens is total light output, so without the area, the conversion is incomplete or inaccurate.
Does changing the distance between light source and surface affect lux or lumens?
Changing distance affects lux, because illuminance decreases when the distance increases due to light spreading out. Lumens, however, measures total light output and stays constant regardless of distance.
Why is surface area important in lux to lumens conversion?
Surface area determines how much area the light spreads over. Since lux is lumens per square meter, multiplying by area gives total lumens. Without knowing area, total light output can’t be found from lux.
Is 300 lux considered bright for indoor lighting?
300 lux is moderate brightness suitable for offices or living rooms, but brightness perception varies. Some tasks require higher lux, meaning more lumens per area, while ambient lighting may be lower.
How accurate is the lux to lumens conversion formula?
The formula is accurate only if the surface area used reflects the actual lit surface. If lighting is uneven or surface shape complex, calculation can be off, but for flat uniform surfaces, it works well.
