100 lux equals 1000 lumens if the illuminated area is 10 square meters. This is because lumens measure total light output, while lux measures light intensity per unit area.
To convert lux to lumens, you multiply the lux value by the surface area in square meters. So without knowing the area, lux alone can’t be converted directly to lumens.
Conversion Tool
Result in lumens:
Conversion Formula
The formula to convert lux (lx) to lumens (lm) is:
Lumens = Lux × Area (in square meters)
This formula works because lux measures the amount of light per unit area, while lumens measure the total light output. So, multiplying the lux value by the illuminated area gives the total lumens.
Example:
- Given: 100 lux and area = 10 m²
- Calculate lumens: 100 lx × 10 m² = 1000 lm
Conversion Example
- Convert 50 lux to lumens for 5 m² area:
- Step 1: Identify lux and area: 50 lx and 5 m²
- Step 2: Multiply lux by area: 50 × 5 = 250 lumens
- Result: 250 lm
- Convert 200 lux to lumens for 8 m² area:
- Step 1: 200 lx and 8 m²
- Step 2: 200 × 8 = 1600 lm
- Result: 1600 lumens
- Convert 75 lux to lumens for 12 m² area:
- Step 1: 75 lx, 12 m²
- Step 2: 75 × 12 = 900 lm
- Result: 900 lumens
Conversion Chart
| Lux (lx) | Lumens (lm) (Area = 10 m²) |
|---|---|
| 75.0 | 750.0 |
| 80.0 | 800.0 |
| 85.0 | 850.0 |
| 90.0 | 900.0 |
| 95.0 | 950.0 |
| 100.0 | 1000.0 |
| 105.0 | 1050.0 |
| 110.0 | 1100.0 |
| 115.0 | 1150.0 |
| 120.0 | 1200.0 |
| 125.0 | 1250.0 |
The chart shows lumens calculated by multiplying the lux value by 10 square meters. To read it, find the lux value, then see the equivalent lumens in the second column for the assumed area.
Related Conversion Questions
- How many lumens does 100 lux produce over 10 square meters?
- What is the lumen output if I have 100 lux on a 5 m² surface?
- Can I convert 100 lux directly to lumens without knowing area?
- If a room measures 20 m² and is lit at 100 lux, what is total lumens?
- How does changing the surface area affect converting 100 lux to lumens?
- Is 100 lux enough to produce 1000 lumens on any surface size?
- What formula should be used to convert 100 lux into lumens?
Conversion Definitions
Lux: Lux is a unit measuring light intensity perceived on a surface area. One lux equals one lumen per square meter. It indicates how brightly an area is illuminated, considering both the light source and distance from it.
Lumens: Lumens quantify the total amount of visible light emitted by a source. Unlike lux, lumens do not depend on area but on the light output itself. Higher lumens means brighter light from the source.
Conversion FAQs
Why do I need the area to convert lux to lumens?
Because lux measures light per square meter, you must multiply by the surface area to get total lumens. Without area, lux alone can’t tell you total light output, since lumens represent total light emitted.
Can I convert lumens to lux without knowing the area?
No, converting lumens to lux requires knowing the area illuminated. Lux is lumens spread over area, so without area, lux value can’t be calculated precisely.
Does changing surface shape affect lux to lumens conversion?
The shape does not matter directly; only the total surface area counts. The formula multiplies lux by area, so irregular shapes with same area produce same lumens from given lux.
What happens if lux is measured at different distances?
Lux decreases as distance from light source increases, since light spreads over larger area. So lumens stay same, but lux varies with distance and surface size.
Is it possible to have lux value higher than lumens?
No, lux and lumens measure different things. Lux is lumens per area, so if area is less than 1 m², lux can be numerically higher than lumens, but actual light output (lumens) doesn’t change.
Last Updated : 03 July, 2025
I’ve put so much effort writing this blog post to provide value to you. It’ll be very helpful for me, if you consider sharing it on social media or with your friends/family. SHARING IS ♥️
Sandeep Bhandari holds a Bachelor of Engineering in Computers from Thapar University (2006). He has 20 years of experience in the technology field. He has a keen interest in various technical fields, including database systems, computer networks, and programming. You can read more about him on his bio page.