4000K LED Bulb

How To Choose The Best 4000K LED Bulbs?

I am quite sure that you are willing to get a 4000K LED bulb for yourself right? And Willing to know more about it? Isn’t it? 

So in the article, we have covered the possible query you might be thinking about the 4000K LED Bulbs. From choosing shape, and size to its wattages and so on. Moreover, we would also provide you with some suggestions that you need to consider before purchasing a product. So without wasting time let’s get into it.


What Does 4000K Mean In LED Lighting?

Let’s start with the basic question what does 4000K really mean? Well, 4000K is a rating on the Kelvin scale. The Kelvin scale is a unit of temperature which ranges from 1000K To 10000K that measures a light’s color temperature. If your light is near the higher number on the Kelvin scale the light tends to appear more white or blue whereas if it’s lower then it looks more orange and red. 

If you head the light up to 2000 degrees, then it appears more orange. Similarly, when you heat them to 4000 degrees it appears more yellowish. 

Color Temperature Chart
Color Temperature Chart

What Color Is 4000K?

4000K is the best color temperature light for neither wanting to have orange look nor something sterile and too cool. So 4000K can be a great color temperature which includes cooler colors and has got warmer tones. 

One can also compare 3000K VS 4000K or any other color so that one can get a better idea about the color of the light. As the light which I might like may not be the best option for you. So you can go for the trial method, which means you can test several lights in your space and go with the one which is best for you. 

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What Wattage Is 4000K?

Well, there are lots of wattages such as 40 watts, 60 watts, 75 watts, or 100 watts, which can have a 400K color temperature. 

Watt is a unit of power that measures some of the light output. Hence 4000K is the color temperature that is used on the Kelvin scale As mentioned earlier Kelvin scale ranges between 1000K to 10000K. 

4000K light bulbs can come in different watts:

  • 40 Watt
  • 60 Watt
  • 75 Watt
  • 100 Watt

Choosing the Right LED Light Bulb Shape and Size – 4000K LED Bulb

4000K light bulbs come in various shapes and sizes. However, the names of the fixtures may be different based on the country where you are residing as of now. 

Light Bulb Shapes
Light Bulb Shapes


Well, 4000K bulbs come in various shapes. Some of the common shapes are:-

  • Candle bulbs
  • Spiral bulbs
  • Standard bulbs
  • Globe bulbs. 


Most people go with the medium or standard E26 bulb type. In the word E26, E stands for Edison, and the number 26 refers to the base diameter in millimeters. 

As E27 is not suitable for American standard lamps, you can go with E26. Besides this A19 is one of the most commonly used bulb sizes. In the word A19, A stands for Arbitrary and 19 refers to the width of the bulb in millimeters, which is a measure of length in the metric system. 

A19 E26 Light Bulb Shape
A19 E26 Light Bulb Shape

Choosing The Light Bulb Brightness (Lumens) – 4000K LED Bulbs

You might also want to know the brightness while choosing the best 4000K LED bulb for you. 

The Light bulb which may look good for your bathroom or living room may not be suitable for the bedroom. 

So want to know more about the lumens? Here you go. Lumens is the SI unit of luminous flux, which measures the quantity of visible light emitted by a source per unit of time. 

Let’s convert lumens to watts which can be easy to understand. Here we have some of the few loose conversions to have a look at when choosing an LED light bulb.

Lumen To LED Watts

  • 50 Watts = 3000 Lumens
  • 40 Watts = 2250 Lumens
  • 25 Watts = 1500 Lumens
  • 15 Watts = 900 Lumens

Note: You may see some variations, these numbers are approximate. 

See  A 60-watt tungsten incandescent bulb is equal to 900 lumens. Similarly, A 60-watt LED bulb is equal to 5400 lumens. 

Using Smart LED Light Bulbs 

Using smart LED light bulbs may be a smarter choice to upgrade the lighting in your space. However, some people are still bound by uncertainties in using smart LED light bulbs. But the fact is after installing it, it is easier for you to control the lights of the house by just using a single app. 

Some of the popular brands which provide smart LED light bulbs include Philips Hue, Govee, Sengled, LIFX, and so on. Some of the manufacturers provide a downloadable app that allows you to easily control the overall lighting of your home with a single click. Also, you can easily alter lights based on your mood. 

LIFX A19 Mini Day and Dusk White Wi-Fi Smart LED Light Bulb
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Tunable LED Light Bulbs (From 2700K- 6500K)

Confused about what color temperature to use on your space?  You can go for a tunable LED light bulb. 

Tunable LED light bulbs are often within the range of 2700K, which is warm to 6500K which is cool. This makes it easy to get 4000K as well as other temperature options. 

Besides this, the best thing I like about the smart bulbs is they can control the specific color from smart devices via Bluetooth, Google Assistant, and Amazon Alexa. 

These types of lights are best for offices, living rooms, and bedrooms. In these places, you can change specific color temperatures and control the lighting of your space.

Smart Light Bulbs
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What Does 4000K Mean In LED Lighting?

Ans: Well, 4000K is a rating on the Kelvin scale. The Kelvin scale is a unit of temperature which ranges from 1000K To 10000K that measures a light’s color temperature.

Is 4000K too bright for living room?

Ans: 4000K isn’t too bright for the living room. One can use 4000K lights in bathrooms, kitchens, and so on.

Is 4000K LED warm or cool?

Ans: Generally cool light is 4000K or above.

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