watts to lumens

Why Do You Need to Know Watts to Lumens Conversion?

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When it comes to choosing the right light bulb for your home, there are many factors to consider. Not only do you want a bulb that will provide the desired level of brightness, but you also want one that is energy efficient and cost-effective.

However, with so many different types of bulbs on the market, it can be difficult to know where to start. That’s where understanding the difference between watts and lumens comes in and luckily we got your back with our Watts to Lumens Conversion Calculators.

Why Choosing the Right Light Bulb is Important 

Choosing the right light bulb is crucial for a number of reasons.

Why Choosing the Right Light Bulb is Important 

Firstly, it can affect the mood and atmosphere of your home. The wrong bulb can create harsh, cold lighting that feels sterile and uninviting, while the right bulb can create a warm, welcoming environment that’s comfortable and inviting.

Secondly, choosing the right bulb can help save money on your energy bills. By selecting bulbs with higher energy efficiency ratings and lower wattage, you can reduce your electricity consumption and save money in the long run. This is particularly important for frequently used areas of your home, such as the kitchen, living room, and bedroom.

Lastly, choosing the right bulb can also impact your health and well-being. Poor lighting can cause eye strain, headaches, and other health issues, while the right lighting can improve your mood, productivity, and overall quality of life. Whether you’re working from home, relaxing with a book, or cooking dinner for your family, choosing the right bulb can make a big difference in your daily life.

All of these factors make it clear why choosing the right light bulb is so important. By taking the time to consider your needs and preferences, as well as the technical details of different bulbs, you can find the perfect lighting solution for your home.

Understanding the Difference Between Watts and Lumens 

Understanding the Difference Between Watts and Lumens 
Watts and Lumens are confusing, we know!

To choose the right light bulb, it’s important to understand the difference between watts and lumens. Watts are a measure of the amount of energy used by the bulb, while lumens measure the brightness or intensity of the light produced by the bulb. In the past, people used to rely on watts as a measure of brightness, assuming that the higher the wattage, the brighter the light. However, this is no longer the case.

Nowadays, we have energy-efficient bulbs that produce more light with less power. For example, an LED bulb might use only 10 watts of power but produce the same amount of light as a traditional incandescent bulb that uses 60 watts. This is why wattage is no longer a reliable indicator of brightness.

Instead, we use lumens to measure the actual brightness of a bulb. Lumens tell us how much light a bulb emits, regardless of how much power it uses. The higher the number of lumens, the brighter the bulb. For example, a bulb with 800 lumens will be brighter than one with only 500 lumens.

Understanding the difference between watts and lumens is crucial when choosing a light bulb, as it helps you find the right bulb for your needs. If you want a brighter light, look for a bulb with a higher lumen rating, rather than a higher wattage. This will ensure that you get the brightness you need without using excessive amounts of energy.

Why Lumens Matter More Than Watts 

While wattage was once the primary factor people considered when selecting light bulbs, lumens have become the more important metric in recent years. This is because lumens measure the actual brightness of a bulb, while wattage only indicates the amount of energy used.

Why Lumens Matter More Than Watts 

Using lumens as the primary measurement allows for a more accurate comparison between different types of bulbs. For example, a 60-watt incandescent bulb produces about 800 lumens, while an LED bulb that uses only 9 watts can produce the same amount of light. By focusing on lumens rather than watts, you can choose a bulb that gives you the desired brightness while also being energy-efficient.

Another reason why lumens matter more than watts is that different types of bulbs can have different levels of brightness for the same amount of power. For instance, incandescent bulbs produce light by heating a filament, which limits their efficiency. On the other hand, LED bulbs use semiconductor materials that can produce light without generating as much heat. This means that LED bulbs can produce more lumens with less wattage than traditional incandescent bulbs.

Additionally, as energy efficiency has become a more important consideration for homeowners, lumens have become a more valuable metric for choosing bulbs. By selecting bulbs with higher lumen output and lower wattage, you can save energy and reduce your electricity bills without sacrificing brightness.

In summary, while watts used to be the primary factor for selecting light bulbs, lumens have become the more important metric in recent years. Focusing on lumens rather than watts allows for a more accurate comparison between different types of bulbs and helps you choose a bulb that provides the desired brightness while being energy-efficient.

Understanding the Watts to Lumens Conversion 

To better understand how to choose the right bulb for your needs, it’s essential to understand the watts to lumens conversion. The conversion between watts and lumens can help you to compare different bulbs and make informed decisions about which one to buy.

To begin with, it’s important to note that there is no straightforward formula for converting watts to lumens. The reason for this is that watts and lumens measure different things. As previously mentioned, watts measure the amount of power used by the bulb, while lumens measure the amount of light produced by the bulb.

However, there are some general guidelines to follow when making a comparison. For example, a traditional incandescent bulb that uses 40 watts typically produces around 500-650 lumens of light. Similarly, a 60-watt incandescent bulb typically produces around 800-1000 lumens of light.

With the advent of energy-efficient bulbs like LED, the conversion can be a bit more complicated. This is because LED bulbs use significantly less wattage to produce the same amount of light as traditional incandescent bulbs. As a result, it’s essential to look for the lumen rating when choosing an LED bulb. For example, a 10-watt LED bulb can produce around 800 lumens of light, the same as a 60-watt incandescent bulb.

When comparing bulbs, it’s also important to consider the color temperature of the light produced. The color temperature is measured in Kelvin and can range from warm yellowish tones to cool bluish tones. Higher color temperature values indicate cooler light, while lower values indicate warmer light. The color temperature you choose will depend on your personal preference and the lighting needs of the space you are lighting. Nearly all lumens values which are given by the manufacturers are on the 4000K color temperature, it is a professional standard.

Understanding the Watts to Lumens Conversion 

In summary, while there is no precise formula for converting watts to lumens, there are general rules of thumb. Understanding the watts to lumens conversion can help you compare different types of bulbs and make informed decisions about which one to buy. Additionally, considering the color temperature of the light produced can help you choose the right bulb for your personal preference and lighting needs.

You can find our watts to lumens conversion tables for incandescent, CFL, and LED lights based on the rules of thumb in the lighting industry below.

Watts to Lumens Conversion Calculator for Incandescent, CFL, and LED Lights

  • The rule of thumb for Incandescent lights is 1 watt of power produces 12.5 to 16 lumens of brightness output.
  • The rule of thumb for CFL lights is 1 watt of power produces 50 to 70 lumens of brightness output.
  • The rule of thumb for LED lights is 1 watt of power produces 75 to 110 lumens of brightness output.

Watts to Lumens Conversion Table

Enter the number of watts below and click “Convert” to see the equivalent lumens for incandescent, CFL, and LED lights.




How to Choose the Right Bulb Using Lumens 

When choosing the right bulb, it’s essential to consider the number of lumens it produces. As previously mentioned, lumens measure the amount of light produced by the bulb. The more lumens a bulb produces, the brighter the light will be.

To determine how many lumens you need, consider the purpose of the room you are lighting. For example, a kitchen or workspace may require brighter lighting than a bedroom or living room. The amount of natural light in the room can also influence the number of lumens you need.

If you are wondering what are the best smart light bulbs for bedrooms, check this out!

Here are some general guidelines for selecting the right bulb based on lumens:

  • For task lighting in areas where you need to focus, such as a kitchen or office, look for bulbs that produce 600-800 lumens.
  • For general lighting in living spaces, such as a bedroom or living room, look for bulbs that produce 400-600 lumens.
  • For ambient lightings, such as in a hallway or stairwell, look for bulbs that produce 200-400 lumens.
  • For decorative lightings, such as in a chandelier, look for bulbs that produce 100-200 lumens.

It’s also important to consider the bulb’s color temperature when choosing the right bulb based on lumens. As previously mentioned, color temperature is measured in Kelvin and can range from warm yellowish tones to cool bluish tones. The color temperature can affect the mood and ambiance of the room.

In summary, selecting the correct bulb based on lumens is essential to achieving the right lighting for your space. Consider the room’s purpose, the amount of natural light, and the color temperature of the bulb when choosing the right bulb based on lumens.

If you are in doubt, you can always check our How bright series which explained different lumens levels in different rooms and activities.

Frequently Asked Questions about Watts and Lumens 

There are many frequently asked questions about watts and lumens, including whether more lumens mean more energy consumption if wattage can be used to determine a bulb’s brightness, and how many lumens are needed for different areas in the home. It’s also important to understand the difference between a watt and a kilowatt-hour, as this can impact your energy bills.

What is the difference between watts and lumens? 

Watts measure the amount of energy a bulb uses, while lumens measure the amount of light produced by the bulb. In the past, people used watts to determine the brightness of a bulb, but with the development of more energy-efficient bulbs, lumens have become the standard for measuring brightness.

How many lumens do I need for a room? 

The number of lumens you need for a room depends on the purpose of the room and the amount of natural light it receives. As a general guideline, task lighting in areas where you need to focus requires 600-800 lumens, general lighting in living spaces requires 400-600 lumens, ambient lighting requires 200-400 lumens, and decorative lighting requires 100-200 lumens. You can check out our How Bright? guide to determine which brightness level is right for you?

Can I use wattage to determine the brightness of LED bulbs? 

No, wattage is not a reliable way to determine the brightness of LED bulbs. LED bulbs are much more energy-efficient than traditional incandescent bulbs, meaning they use fewer watts to produce the same amount of light. Instead, look for the number of lumens on the bulb’s packaging to determine its brightness.

How can I convert watts to lumens? 

You can use our watts to lumens conversion calculator. The lumens for a watt vary depending on the type of bulb, so it’s important to check the packaging or do research for the bulb you are using.

Is a higher wattage bulb always brighter than a lower wattage bulb? 

No, a higher wattage bulb is not always brighter than a lower wattage bulb. As previously mentioned, the amount of energy a bulb uses does not necessarily indicate its brightness. Instead, look for the number of lumens on the bulb’s packaging to determine its brightness.

How can I choose the right color temperature for my bulb? 

Choosing the right color temperature for your bulb depends on the mood and ambiance you want to create in the room. For a warm and cozy atmosphere, choose a bulb with a lower color temperature, such as 2700K. For a cooler, more energizing atmosphere, choose a bulb with a higher color temperature, such as 5000K. For an example, you can check our article “The Best LED Colors To Help You Get the Most Restful Sleep”. And also, you can check out “How to Use Color Temperature of Lights For Home Lighting”.

TL;DR / Conclusion 


In conclusion, understanding the difference between watts and lumens is crucial when it comes to choosing the right light bulb for your home or office. By focusing on lumens rather than watts, you can ensure that you get the right amount of light for your space while also saving energy and money.

If you still have questions or need further guidance on choosing the right light bulb, be sure to check out CondoChance. Our website offers a variety of resources and product reviews to help you make informed decisions when it comes to your lighting needs. So don’t hesitate to browse our website and find the information you need to create the perfect lighting environment for your space.

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Philosophy: We want to make sure that our readers can use smart home products with maximum efficiency. Our ultimate desire in this blog is to ensure our readers use smart home gadgets to make their lives easier, more accessible, and safer.

Batu of CondoChance Team

BSc. Electrical Engineer & MBA
10+ years of industrial experience as an Electrical Engineer

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