Sometimes the problem is not in having not enough light but with too much light as well.

In this article, we will answer and cover these topics:

So, how many lumens do you need for your desk lamp to optimally perform tasks?

In short, it all depends on the purpose of the lamp in question.

For general purposes like reading and writing, it would be around 450 lumens.

For more delicate tasks like looking at small parts because you are a repair-man or doing some heavy-duty drafting, it would be a minimum of 800, but we mostly recommend about 1100 lumens.

Note! As you age, the more light you will need. For example, if you are under 55, you would generally need around 450 lumens. If you are of age 55 and above, you need 800 lumens, almost double as before.

Lumens, or lm for short, are a measurement of the brightness of the light. The more lumen light has, the brighter it will appear.

Lumens are, in a sense, a new way to actually measure the light output of the bulb, which is more accurate than the previous measurement – watt.

Sometimes you may see and hear about another measurement that is called Lux or lx for short. Lux isn’t essential for you and your desk lamp unless you are in the photo and video business industry.

For all of you who love doing DIY projects you can create your very own desk lamp by following our simple guide. 

Understanding Correlations Between Watts And Lumens

Watt indicates how much energy is needed (cost of energy) to produce the light. This has been the standard method of household thinking in how much lighting is required.

So, how many watts do you need for a desk lamp?

For general purposes, 40 watts is enough. It is equivalent to 450 lumens stated above.

For more delicate tasks, 60 to 75 watts is sufficient. It is equivalent to 800 to 1100 lumens, respectively.

Note! There is no accurate official conversion method from watts to lumens. When we speak of equivalent, that is a good approximation and can vary across multiple manufacturers.

Types Of Light-Bulbs And Why Is It Important To Properly Choose One

Light bulbs are two centuries old today, so it’s normal to expect that they have evolved into many different shapes and sizes. Although most people aren’t aware of that fact, we will show you the different types of bulbs and show you their advantages and disadvantages.

Here is the list of most common types of light-bulbs for your desk surroundings:

Incandescent Bulb

an incandescent light bulbs in a dark room
An example of a incandescent light bulb

Incandescent bulbs are the classic ones and standard in households and in various buildings up until the late 1990s.

They work as an electric process as the current passes through a tungsten wire filament, and it starts to glow. They are cheap and affordable, having a nice cozy warm light, and they are easily disposable.

However, they are not energy efficient since most of the energy is transformed into heat. Also, they only last about 700 to 1000 hours of use.

Pros
Cons
Cheap Cost
Least Energy Efficient
Nice Warm Light
Fragile
Dimmable
Shortest Lifespan

Halogen Bulb

a halogen light bulb
An example of a halogen light bulb

Halogen bulbs are similar to incandescent ones but with one crucial difference that makes them a better choice.

They have a chemical process that prevents the degradation of the wire filament. The secret is in the insertion of a small amount of Halogen with an inert gas. That same gas increases the brightness levels and performance and extends the bulb’s lifespan of about 2500-3000 hours of use.

Another great thing about Halogen is that they are smaller in size as compared to incandescent ones.

Pros
Cons
High Brightness
Little Energy Savings
Nice Warm Light
Little More Expensive
Dimmable
Short Lifespan

Compact Fluorescent (CFL)

CFL
An example of a CFL bulb

The compact fluorescent lighting is almost the same as its smaller counterpart above. It also uses mercury and differs mostly by its shape, which consists of multiple tubular loops and resembles the incandescent bulb type. Mostly anyways.

It also produces the same amount of light with much less energy and power and has a longer lifespan from 7000 to 10.000 hours of use. Again, you need to carefully dispose them because of mercury.

Pros
Cons
Low Cost
Contains Mercury
Longer Lifespan
Not Dimmable
Cool White Light
Long Warm-up Time
More Energy Efficient
Fragile

Light Emitting Diode (LED)

a LED light bulb on a black background
An example of a LED light bulb

LEDs are becoming the standard norm for bulbs around the world. They are conquering the task lighting industry, including desk and similar lamps, and becoming more popular.

LEDs are semiconductor devices that emit light from the negatively charged diode when struck by electric energy. They are very energy efficient and can produce much brighter light and various lighting colors as well with less energy.

These bulbs have a considerable lifespan of over 50.000 hours of use, which is mind-blowing compared with previous incandescent bulbs of 1000 hours of use.

It is also worth mentioning that the LED lights weaken over time, meaning that they don’t emit that much brightness as before.

Pros
Cons
Most Energy Efficient
High Cost
Produces Little Heat
Not All Are Dimmable
Cool Performance White Light
Light Weakens Over Time
Longest Lifespan
Many Light Color Options
Easy Disposal

Other Important Features Of Light To Consider

Other exciting features and light abilities can be useful to know if you want to have the best possible light from your desk lamp. So if you are curious, then read on.

Color Temperature

An example of light color temperature scale
An example of different color temperatures

Not every light is created equal. Color temperature is the ability of light to appear in different colors, thus affecting the surrounding ambient.

The light can be warmer or cooler in appearance. Its unit is measured in Kelvin or K for short. The higher the K, the whiter, and bluish the light will appear.

Why is this important?

As stated before, the light temperature affects the surrounding areas, including you and your moods. It can also increase performance if you work with the correct color temperature.

Note! Even thou higher levels of K seems to increase the overall brightness of the bulb, it’s not true. The same light output remains no matter the levels of the color temperature.

There are three types of light color coming from bulbs:

Warm Light (2700K to 3000K)

A soft warmish yellow light that creates a soothing and relaxing feel. It is a good choice for home offices and for areas such as dining rooms, living rooms, and bedrooms.

Bright Cool White (3500K – 4100K)

This light is a bit whiter than the previous lights, and its a good choice for lighting up work-spaces and areas such as bathrooms, kitchens, and outdoor lighting.

Daylight (5000K – 6500K)

It is a more bluish and whitish light. It resembles noon on a day without clouds. A good choice for working on various projects that requires focus on small details and similar activities.

Color Rendering Index (CRI)

An color rendering index example on a red apple
An example of different color indexes

CRI is the ability of light to reveal the true colors of an illuminating object. It is measured on a scale from 0 to 100– the higher the CRI, the higher color accuracy. Only natural light has the highest index of 100.

Why is this important?

If you can’t see an object’s true colors, you can’t expect to work properly. This is truer if you work with small parts.

Having a low CRI light source can trick your eyes into believing that you are working on one color when it’s a totally different one.

Most LED lights have an 80 or more index value, so we recommend going with that.

Summary

  • How many lumens do you need depends on the tasks that you will be doing–the more demanding, the more light you will need.

  • The older you get, the more light you will need also.

  • Besides lumens, you also need to know other vital light attributes, such as color temperature and color rendering index. These factors can influence your productivity.

  • There are many types of light-bulbs each with their advantages and disadvantages. We always recommend going with LED bulbs, and thanks to the broad market, you can choose many different desk lamps that will fit your needs and tastes.

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Author Bio: Toni Segvic

Picture of the author and owner of looneylumens.com websiteOwner of the looneylumens.com website. A tech enthusiast and a marketer. Lover of lamps since I spend most of my days in front of the computer working. So I take my lamps very serious since they can impact our productivity. My moto is: “Concentrate on the things that you can control. The rest, leave it to God.”