750 lux corresponds to 750 lumens when the illuminated area is exactly 1 square meter.
Lux measures illumination intensity over an area, while lumens quantify total light output. Since 1 lux equals 1 lumen per square meter, converting 750 lux to lumens depends on the surface area illuminated. For 1 m², 750 lux equals 750 lumens.
Conversion Tool
Result in lumens:
Conversion Formula
Lux (lx) is the amount of luminous flux (lumens) spread over one square meter. The formula to convert lux to lumens requires knowing the surface area illuminated, since:
Lumens (lm) = Lux (lx) × Area (m²)
This means the total light output (lumens) equals the illumination level multiplied by the area lit. So if you have 750 lux over 1 square meter, the lumens equals 750 × 1 = 750 lumens.
For example:
- If area = 2 m², then lumens = 750 × 2 = 1500 lm.
- If area = 0.5 m², then lumens = 750 × 0.5 = 375 lm.
This formula works because lux measures flux per unit area, so multiplying by the area gives total flux.
Conversion Example
- Convert 600 lux to lumens over 3 m²:
- Multiply 600 lx by 3 m²
- 600 × 3 = 1800 lumens
- Result: 1800 lm
- Convert 850 lux to lumens over 0.8 m²:
- 850 × 0.8 = 680 lumens
- Result: 680 lm
- Convert 400 lux to lumens over 5 m²:
- 400 × 5 = 2000 lumens
- Result: 2000 lm
- Convert 1000 lux to lumens over 1.2 m²:
- 1000 × 1.2 = 1200 lumens
- Result: 1200 lm
- Convert 720 lux to lumens over 2.5 m²:
- 720 × 2.5 = 1800 lumens
- Result: 1800 lm
Conversion Chart
The following chart shows lux values from 725.0 to 775.0 with their equivalent lumens, assuming the surface area is 1 m². To use, find the lux value and read across to its lumens output.
| Lux (lx) | Lumens (lm) at 1 m² |
|---|---|
| 725.0 | 725.0 |
| 730.0 | 730.0 |
| 735.0 | 735.0 |
| 740.0 | 740.0 |
| 745.0 | 745.0 |
| 750.0 | 750.0 |
| 755.0 | 755.0 |
| 760.0 | 760.0 |
| 765.0 | 765.0 |
| 770.0 | 770.0 |
| 775.0 | 775.0 |
Related Conversion Questions
- How many lumens does 750 lux produce on a 2 square meter surface?
- What is the lumen output when 750 lux illuminates 0.5 m²?
- Can 750 lux be directly converted to lumens without knowing area?
- How do I convert 750 lux to lumens for lighting a 3 m² room?
- Is 750 lux equal to 750 lumens in all cases?
- How does changing the area affect lumens from 750 lux?
- What formula converts 750 lux into lumens for different surface sizes?
Conversion Definitions
Lux: Lux is a unit measuring the intensity of light that hits a surface per unit area. It quantifies how bright the surface appears by counting lumens spread over square meters. For example, 1 lux means 1 lumen per square meter, helping to assess illumination levels in a space.
Lumens: Lumens measure the total visible light output emitted from a source, regardless of direction. Unlike lux, lumens don’t depend on area but show how much light a bulb or lamp produces. Higher lumens means brighter light, useful for comparing bulbs.
Conversion FAQs
Why can’t I convert lux to lumens without knowing the area?
Because lux measures illumination per square meter, converting it to total lumens requires the surface area illuminated. Without knowing area, you can’t determine total luminous flux, as lux is lumens divided by area, so area is necessary for reverse calculation.
Does 750 lux always equal 750 lumens?
No, 750 lux equals 750 lumens only when the area lit is exactly 1 square meter. If area changes, lumens = lux × area. So, 750 lux on 2 m² would be 1500 lumens, not 750 lumens.
Can I use this conversion formula for curved surfaces?
Curved surfaces complicate the calculation because the effective area receiving light changes with angle. The simple formula assumes flat surfaces, so for curved surfaces, you need to adjust area or use more advanced photometric methods.
Is lumen always more useful than lux for lighting?
They serve different purposes. Lumens measure total light output from a source, while lux indicates how much light actually falls on a surface. For room brightness, lux is more relevant; for bulb brightness, lumens matter more.
How precise is the conversion between lux and lumens?
The conversion is exact only if the area is known and flat. Measurement errors, reflective surfaces, and light distribution affect real results, so practical lux-to-lumen conversions can vary slightly depending on conditions.