35 lux corresponds to 35 lumens when the illuminated area is 1 square meter.
Lux is a measure of illuminance, which means the amount of light that hits a surface area. Lumens measure the total amount of visible light emitted by a source. When the surface area is exactly 1 square meter, lux and lumens have the same numerical value.
Conversion Tool
Result in lumens:
Conversion Formula
The formula to convert lux to lumens depends on the surface area being illuminated. The relationship is:
Lumens = Lux × Area (in square meters)
This works because lux measures how many lumens spread over a square meter. If you know the lux level and the size of area in meters squared, you multiply them to find total lumens.
For example, if 35 lux illuminates 1 square meter:
- Lux = 35
- Area = 1 m²
- Lumens = 35 × 1 = 35 lumens
So, 35 lux on 1 square meter equals 35 lumens.
Conversion Example
- Example 1: 50 lux on 2 m²
- Multiply 50 by 2
- 50 × 2 = 100 lumens
- So, 50 lux on 2 square meters equals 100 lumens
- Example 2: 20 lux on 0.5 m²
- 20 × 0.5 = 10 lumens
- This means 20 lux over half a square meter equals 10 lumens total
- Example 3: 75 lux on 3 m²
- 75 × 3 = 225 lumens
- So for 3 square meters illuminated at 75 lux, total lumens is 225
- Example 4: 10 lux on 4.5 m²
- 10 × 4.5 = 45 lumens
- Hence, 10 lux on 4.5 square meter surface equals 45 lumens
Conversion Chart
| Lux (for 1 m²) | Lumens |
|---|---|
| 10.0 | 10.0 |
| 15.0 | 15.0 |
| 20.0 | 20.0 |
| 25.0 | 25.0 |
| 30.0 | 30.0 |
| 35.0 | 35.0 |
| 40.0 | 40.0 |
| 45.0 | 45.0 |
| 50.0 | 50.0 |
| 55.0 | 55.0 |
| 60.0 | 60.0 |
The chart shows lux values converted directly to lumens on an area of exactly 1 square meter. You can use it by finding the lux value and seeing the corresponding lumens. For areas other than 1 m², multiply the lumens by the area size.
Related Conversion Questions
- How many lumens are in 35 lux over 2 square meters?
- What is the formula to convert 35 lux to lumens for a 3 m² surface?
- If a room has 35 lux lighting, how do I find total lumens for 5 square meters?
- Can 35 lux be converted directly to lumens without knowing the area?
- What does 35 lux mean in lumens for a desk lamp illuminating 0.8 square meters?
- How do I calculate lumens from 35 lux in a room with 10 m² floor area?
- Why does 35 lux equal 35 lumens only at one square meter area?
Conversion Definitions
Lux: Lux is a metric unit measuring illuminance, which is the amount of light that hits a surface area. It quantifies how intense the light appears over a square meter, taking into account human eye sensitivity to visible light. Lux helps in understanding brightness in environments.
Lumens: Lumens measure the total quantity of visible light emitted by a source. Unlike lux, lumens do not consider area but total light output perceived by the eye. Higher lumens means a brighter light source, regardless of how the light spreads on surfaces.
Conversion FAQs
Can I convert lux to lumens without knowing the illuminated area?
No, you cannot accurately convert lux to lumens without the area. Lux measures light per square meter, so lumens equals lux multiplied by the surface size. Without area, the total lumens can’t be determined.
Why does 35 lux equal 35 lumens only if the area is 1 square meter?
Because lux is lumens divided by area. When the area is exactly 1 m², the lux number equals the lumen count. If the area changes, the relationship changes proportionally.
How does changing the surface area affect the conversion from lux to lumens?
Increasing the illuminated area increases total lumens for the same lux value. For instance, 35 lux on 2 m² gives 70 lumens, while on 0.5 m² it gives 17.5 lumens. The total light output depends on both lux and area.
Is lux measurement affected by distance from the light source?
Yes, lux decreases with distance from the source because light spreads over larger area. Lumens remain constant, but lux value drops because same lumens cover more surface area.
What tools are practical for measuring lux and lumens in real settings?
Lux meters measure illuminance directly on surfaces. Lumen measurements require integrating sphere devices or manufacturer’s specs. Using a lux meter alongside known area helps calculate lumens indirectly.