sperti vitamin d lamp

Sperti Vitamin D Lamp Review: Testing and Data!

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Feeling sluggish and tired? It’s time to add some Vitamin D sunshine to your life and we’ve got just the thing!

In this blog post, we’re taking a closer look at the Sperti Vitamin D Lamp and giving it the royal treatment with our thorough testing and data analysis. From ease of use to effectiveness, we’re leaving no stone unturned in our quest to find out if this lamp is the real deal.

So, whether you’re dealing with a Vitamin D deficiency or simply want to boost your mood, energy and overall well-being, come along with us on this journey and see if the Sperti Vitamin D Lamp is the answer to all your problems.

Here is my video review if you’d prefer that!

Does the Sperti Vitamin D Sun Lamp Work?


The Sperti vitamin D lamp is an FDA-approved class II medical device that has been proven to increase vitamin D levels.

sperti sunlamp spectrum
The section on the left is the UVB that helps you produce vitamin D. (Source)

There’s definitely enough UVB in this lamp to produce vitamin D!

In fact, Sperti conducted their own study to get FDA approval.

The Sperti Vitamin D Study

In this study, 5 participants with skin types 2 and 3, were irradiated for 5 minutes, 3 times per week for 4 weeks.

At the end of the study, all 5 subjects had an average increase in vitamin d levels of 47.5%.

a screenshot of sperti's vitamin d study in which they state all participants showed a 47.5% increase in vitamin d levels on average

Not bad! And since you can use the lamp more than they did in this study, these results can be improved upon!

How to Use the Sperti Vitamin D Lamp

Let’s go over the recommendations for using the Sperti lamp.

How Often Should You Use It?

During the first week, Sperti recommends using the lamp for 3 minutes, every other day.

If this doesn’t cause you to burn, they recommend increasing this duration to 4 minutes during week two.

While on week three and beyond, the recommended exposure duration is capped at 5 minutes max.

sperti lamp directions
Directions from the Sperti vitamin D lamp user guide (Source)

It’s important to note that this 5-minute limit only applies to the part of the body you’ve irritated.

Sperti themselves claim that you can do both front and back.

How to Use the Lamp

Since the recommended distance is 15 inches, you’ll need to make sure you aren’t any closer than this.

When using the lamp on your front side, you can use your arm as a gauge of distance. Most people will find that while forming a fist, from your elbow to your fist is about 15 inches. So you can use this as a gauge.

However since you can’t do this for your backside, an easier way may be to find a place where you can place the lamp 15 inches from the edge of a surface.

This way you know that when you stand right at the edge, you’re in the right spot.

Are Vitamin D Lamps Safe?

Vitamin D lamps are safe if you use them for the recommended amount of time and don’t stand too close.

Just like the sun, you can damage your skin if you use the Sperti lamp too long, so don’t!

There are certain medical conditions and lifestyle behaviors that can increase your susceptibility to photodamage from ultraviolet light.

Some examples of things that can increase photosensitivity:

  • Birth control
  • Perfumes and lotions containing essential oils
  • NSAIDS like ibuprofen
  • Vegetable seed oil consumption
  • and much more!

Here is a bigger list provided by Sperti in their product manual:

a large list of things that can increase photosensitivity to ultraviolet light

So just know that there are things you can and should be doing to improve your sensitivity to damage from the sunlight.

Who Can Use the Lamp?

In addition, Sperti warns that those with type 1 skin should not use their device. Think pale ginger, these are the Ron Weasly types.

fitzpatrick skin types
The Fitzpatrick skin type chart. (Source)

This is because these folks have very little adaptation to ultraviolet light and should exercise caution when using a powerful lamp like the Sperti.

If you’re of a paler complexion, be sure to limit your exposure time and distance from the lamp wisely and watch for redness for 48 hours following use.

Does the Sperti Vitamin D Lamp Give You a Tan?

It’s not intended for tanning, and Sperti claims it will not tan your skin.

Though there’s certainly plenty of UVA in this lamp, which is the part of the sun primarily responsible for the tanning effect.

I suspect that it will produce a mild tan over time in some individuals who tan well.

The Benefits of a Vitamin D Lamp

There are many benefits to exposure to sunlight and ultraviolet light you may or may not be aware of.

As the authors of this study point out, exposure to sunlight is necessary for public health!

For one, exposure to UVB rays from the sun gives us our primary source of vitamin D! Many of us in the United States will struggle to produce enough throughout the year and could benefit greatly from a vitamin D lamp.

According to this study, it also appears as though UVB exposure on the skin helps modulate the gut microbiome! These are preliminary findings but they go to show us that there’s more at work here than we may know about.

We also produce natural opiates called endorphins when exposed to ultraviolet radiation, this is why being in the sun feels so good!

We also now know that ultraviolet exposure on the skin produces nitric oxide which helps a lot with blood flow.

Need I go on? As long as you don’t burn yourself to a crisp, the sun is a powerful and useful resource.

The immense benefits of UVB and sunlight are summarized greatly in Dr. Holick’s book The Vitamin D Solution, which I highly recommend you check out!

Testing the Sperti Vitamin D Lamp

I want this review to be thorough, and since I’ll be making my own vitamin D lamp, I’ve taken some measurements of the Sperti lamp and varying distances to see what we’re working with.

UV Index

The first thing I wanted to know was roughly what the UV Index was at various distances from the lamp.

At around the recommended 15″ from the grate, the UVI is around 14, which is about the max you’d see at the equator, so it’s no wonder 5 minutes is the max!

As you can see in the graph below, if you’re a bit sensitive, you can back up to where the lamp’s UVI is lower.

a chart showing the uv index per inch from 10 inches to 50 inches from the bulbs

As you can see the UV index rises sharply the closer you get, it jumps up to around 22 at 1 foot. So be careful not to get too close for too long!

Here’s a link to the data we collected if you’d like to check it out for yourself!


Next, I wanted to know what the ratio of UVA to UVB was, again, roughly speaking. From the measurement I got using my solar meters, it looks as if there’s just a bit more UVA than UVB.

a chart showing the relative amounts of uva and uvb per inch from 10 inches to 500 inches from the bulbs

This makes sense since in Sperti’s study, their spectral graph shows more UVA than UVB.

Magnetic and Electric Fields

Finally, I was curious about EMFs, so using an EMF GQ-390, I checked these as well.

Fortunately, there’s nothing to be found here. There is a magnetic field starting at around 6″ from the unit, but since you won’t be spending any time in that range, it doesn’t really matter.

Should You Buy It?

Since the Sperti Sun Lamp comes with a 60-day money-back guarantee, there’s almost no reason not to try it out!

It’s portable, super easy to use, and it’s an excellent way to produce vitamin D and endorphins throughout the cold winter months.

And if that doesn’t sell you on it, one look at Sperti’s trust pilot page will show you just how loved this product is by its users!

Sperti Vitamin D Light

Sperti Vitamin D Lamp

The only sunlamp to get Vitamin D from UV light the natural way!

  • 60-Day, 100% Money Back Guarantee
  • Proven clinical study
  • 5 minutes of use, every other day
  • 1,000-hour bulb life
  • 7-year product warranty

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