Lux to Lumen Calculator: Convert Lux to Lumens
Calculate total light output by entering the lux and area details below.
Understanding Lux and Lumens
Lux measures the intensity of light that falls on a given surface area, while lumens measure the total light output emitted by a source. Converting lux to lumens is useful when determining the total light output needed for a specific area based on its lighting conditions.
Lux vs Lumens
While lumens represent the total light output from a light source, lux measures how much light is received on a surface. The relationship between lux and lumens depends on the area being illuminated. Lux = Lumens / Area (m²). Hence, to find lumens from lux, you multiply lux by the area of the surface in square meters.
Lux to Lumen Conversion Formula
The basic formula to convert lux to lumens is:
Lumens = Lux × Area (m²)
Examples
If a room of 20 square meters receives 200 lux, the total lumens needed to illuminate the area will be:
Lumens = 200 lux × 20 m² = 4000 lumens
Common Lux Measurements
Different environments require different lux levels to ensure proper illumination:
| Environment | Recommended Lux Level |
|---|---|
| Office Work | 300-500 lux |
| Living Room | 100-300 lux |
| Bedroom | 100-200 lux |
| Retail Space | 1000-2000 lux |
| Gym | 500-1000 lux |
How to Choose the Right Lighting for Your Space
When designing lighting for a space, consider the following factors:
- Purpose of the Room: Task-oriented rooms need higher lux levels (e.g., kitchens, offices), while relaxation areas require lower lux levels (e.g., living rooms, bedrooms).
- Fixture Type: Ensure the light fixtures match your space and provide the necessary lumens for the area.
- Energy Efficiency: LED lights are highly recommended for efficient and cost-effective lighting solutions.
Frequently Asked Questions
What is the difference between lux and lumens?
Lux is the measure of how much light reaches a specific surface, while lumens measure the total light output from a source. Lux helps in understanding the light distribution in a given area.
How many lumens are needed for a room?
The number of lumens required depends on the room's size and purpose. A typical office needs around 300-500 lux, while a bedroom may require only 100-200 lux. Use the lux to lumens calculator to find the exact lumens needed for your space.
Can I calculate the total lumens for my entire house?
Yes, you can calculate the lumens needed for each room based on its size and lux requirement, and then sum them up to determine the total lumens for your house.
Why is lux important for lighting design?
Lux is important because it ensures that light levels are appropriate for the activities conducted in a given space. Too little lux can make tasks difficult, while too much can create discomfort.