What is the Difference Between Lux and Lumens?

what is the difference between lux and lumens

Are you going to select a new reading lamp? It is to be stylish and adjustable. Brightness is a very important factor to consider. Every room in your house or office is to have proper illumination. What is the difference between lux and lumens? Measure brightness and light output. It’s essential to ensure visual comfort, visibility or security at night. Let’s learn how to calculate it. It helps you to select suitable lighting fixtures that meet your needs.

Importance of Indoor Lighting

Are you renovating your house, office or garage? If you do it, you are to provide adequate illumination. If you don’t, you may want to adjust it. Best floor lamps for reading are intuitive to install. They require virtually no electrical wiring works.

See interesting information about best floor lamps for reading!
When it goes about interior design, lighting is an important, functional aspect. Depending on applications, illumination performs different functions. It’s necessary to:

  1. Increase your indoor safety.
  2. Perform various tasks.
  3. Decorate interior design.
  4. Create warm, relaxing atmosphere or working climate.

Your basement, closet or garage is to be inviting and comfortable: best closet lighting is to ensure essential visibility. In a workshop, you might need more intense light. Benchwork, machining, and precise joinery require it.

Right Now interesting information about best lighting for closet!

What is Brighter Lumens or Lux?

Quite naturally, using daylight is beneficial. Have you got many hours of sunshine? In California, we enjoy from 200 to 300 sunny hours per month. In May, it’s amazing. If you live in a rainier climate, maximize natural lighting. Use your windows to allow it. If a room has no access to windows, it might be a tricky task.

How many lumens per square foot workshop needs? It depends on its size and application. National Optical Astronomy Observatory recommends certain light levels. They refer to various spaces, supposing they are 20 m2 (about 215 ft2) each. Let’s assume, we use energy-saving LED bulbs.

Light Lumens Chart

light bulb lumens chart

So, how many lumens are in a Lux? It definitely depends on your room area. Quite naturally, all rooms can be the same by size. Small walk-in closets are about 25 ft2. 2-car garage workshop is 600-660 ft2. Now we can calculate the illuminance we need. It’s not easy, we are to measure the room area is square meters. Let’s take the point further.

How Do You Convert Lumens to Lux?

Are you selecting suitable bulbs and luminaires? Understand their brightness to make a good pick. Several units determine it. They belong to the International System of Units (SI). It regards lux and lumen as photometric quantities.

So, lumen measures luminous flux. It calculates amount of light that is visible. A source or luminaire emits it in all directions and sides. Lumens vs lux is an applicative, functional unit. Manufacturers use it to denominate light output of optical devices and luminaires. They include:

  • projectors;
  • lamps;
  • flashlights;
  • various light fittings.

Lux versus lumens is an indicative unit. It measures illuminance. It characterizes amount of light that falls on the floor or another surface and shows how much light illuminates a certain area.

1 lux = 1 lumen/ m2

How bright is 1 lux? Full moon on a clear night provides airglow of this kind. For comparison, office lighting is about 320-500 lux. Sun emits from 32 to 100 thousand lux on a bright day. So, lux measures intensity of light. It shows perception of brightness by human eye. Therefore, lux has a regulatory value. It shows if a light is enough for the purpose. Authorities use it to create standards. They denominate essential light levels in schools and other public places.

How Many Lumens Do You Need to Project in Daylight?

It might be not less than 2,000-2,500 lux. It works indoors, in a semi-lit environment. One lumen is not much light. To compare, a 100W incandescent bulb emits 1,600 lm. Projector is an optical device that comes with multiple technical aspects. You are to consider its:

  • resolution;
  • contrast;
  • format (aspect ratio);
  • imaging technology;
  • connectivity;
  • lamp life.

Brightness is a crucial parameter. How many lumens do you need to project in daylight? Quite naturally, outdoor projectors exist. 3,000-4,000 lumens is minimum acceptable rating. It’s enough to project an image in a well-lit room or outdoors, before sunset. It depends on your projector screen size. Larger screes need more lumens. This way, image is bright enough. Thus, projectors with 12,000 – 15,000 lumen ratings exist.

How Many Lux is a 100 Watt Light Bulb?

Watt is a unit of power. It measures energy the luminaire uses every second. Si System defines it as 1 joule of energy per second. Wattage refers to:how bright is 1 lux

  • minimal amount of energy necessary to create light;
  • heat output;
  • inefficiencies and power losess of a lighting fixture.

Selecting the best light for studying, consider bulb wattage. It helps you to understand how much energy it consumes. Wattage of light fixtures affects your electricity bills. According to DOE, lighting account for 5% of your energy budget. An average US household dedicate the cost.

Do you compare light bulbs of the same type? 100W incandescent bulbs are brighter than 40W or 60W devices. Its filament heats up and glows brighter due to higher resistance. Outdated incandescent light bulbs waste a lot of energy. They come with thick metal bases to avoid overheating.

Luminous efficacy shows how energy-efficient is the light bulb. The coefficient comes in lumens per watt. Therefore, switching to energy-efficient bulbs is well-judged nowadays. Smart LED bulbs are the most cost-saving. Their luminous efficacy is up to 100 LPW. Efficacy of a typical incandescent light is only about 10-17 LPW.

General Impression

Do more lumens mean better projector? It’s a credible measure of brightness. Bright lamp means a clear overall picture and vibrant colors. Thus, selecting a light fixture or a bulb, consider its lumens rating. Wattage shows your energy consumption. Are you going to illuminate your house or office? Don’t forget to consider the light level you need. Calculate the number of lighting fixtures and their brightness. Ensure safety and comfort for your eyes.

Harry Brown

Hello, welcome to the blog! My name is Harry. I am concerned about my eyes health. What about you? Do you like reading? By choosing the right light intensity and color, you will avoid many awkward situations. I hope, my articles and reviews help you.

Add comment