1200 lux is equal to 1200 lumens when the illuminated area is exactly 1 square meter.
Lux measures illuminance or the amount of light falling on a surface, while lumens measure luminous flux or total light emitted. To convert lux to lumens, you multiply lux by the area in square meters where the light is spread. For 1200 lux over 1 m², the lumens equal 1200.
Conversion Tool
Result in lumens:
Conversion Formula
The conversion from lux to lumens depends on the area where the light is spread. The formula is:
Lumens = Lux × Area (in square meters)
Lux measures how much light falls on a surface per square meter. Lumens measure the total light emitted. If you know the lux value and the size of the illuminated area, multiply them to get lumens. For example, if a surface of 2 m² is lit with 500 lux, the total lumens is 500 × 2 = 1000 lumens.
Conversion Example
- Example 1: 800 lux over 1.5 m²
- Multiply 800 lux × 1.5 m²
- Result: 1200 lumens
- Example 2: 1500 lux over 0.8 m²
- Calculate 1500 × 0.8
- Resulting in 1200 lumens
- Example 3: 1000 lux over 1.2 m²
- Multiply 1000 lux by 1.2
- Gives 1200 lumens
- Example 4: 600 lux over 2 m²
- 600 × 2 = 1200 lumens
Conversion Chart
This chart shows lux values from 1175.0 to 1225.0 converted to lumens assuming 1 square meter area. To use the chart, find the lux value closest to yours and read the corresponding lumens directly.
| Lux | Lumens (for 1 m²) |
|---|---|
| 1175.0 | 1175.0 |
| 1177.5 | 1177.5 |
| 1180.0 | 1180.0 |
| 1182.5 | 1182.5 |
| 1185.0 | 1185.0 |
| 1187.5 | 1187.5 |
| 1190.0 | 1190.0 |
| 1192.5 | 1192.5 |
| 1195.0 | 1195.0 |
| 1197.5 | 1197.5 |
| 1200.0 | 1200.0 |
| 1202.5 | 1202.5 |
| 1205.0 | 1205.0 |
| 1207.5 | 1207.5 |
| 1210.0 | 1210.0 |
| 1212.5 | 1212.5 |
| 1215.0 | 1215.0 |
| 1217.5 | 1217.5 |
| 1220.0 | 1220.0 |
| 1222.5 | 1222.5 |
| 1225.0 | 1225.0 |
Related Conversion Questions
- How many lumens are in 1200 lux over a 2 square meter surface?
- What’s the difference between lux and lumens when measuring light?
- Does 1200 lux always equal 1200 lumens?
- How to calculate lumens from lux for different room sizes?
- Can 1200 lumens be converted back to lux?
- What area do I need to get 1200 lumens from 1200 lux?
- How does changing the surface area affect lumens if lux is constant?
Conversion Definitions
Lux: Lux is a unit measuring illuminance, which means how much visible light lands on a surface area. One lux equals one lumen per square meter. It tells how brightly the surface is lit, affected by distance and angle of light source.
Lumens: Lumens measure the total quantity of visible light emitted by a source in all directions. Unlike lux, lumens count the overall light output, not how concentrated or spread it is on a surface.
Conversion FAQs
Is the lux to lumens conversion always based on 1 square meter?
No, the conversion depends on the area illuminated. Lux indicates light per square meter, so to get lumens, multiply by the actual surface area. If the area is larger or smaller than one square meter, the lumens value changes accordingly.
Why can’t I convert lux to lumens without knowing the surface area?
Because lux measures light intensity per unit area, without knowing the size of that area, you can’t determine the total light emitted (lumens). Lumens are total light output, lux is how much of that light hits a certain space.
Can two different light sources have the same lux but different lumens?
Yes, if they illuminate areas of different sizes. For example, 500 lux over 1 m² is 500 lumens, but 500 lux over 2 m² is 1000 lumens, so total light output differs though intensity per area is the same.
Does the angle of light affect lux and lumens conversions?
Lux values depend on how light spreads and angle, since illuminance changes with direction. Lumens measure total emitted light regardless of angle, so angle affects lux but not lumens directly.
Are lux and lumens interchangeable units?
No, they measure different properties. Lux measures light on a surface per area, lumens measure total light output. They are related through area, but not directly interchangeable without it.
Last Updated : 22 July, 2025
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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.