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Learn What is Irradiance

What Is the Irradiance?

One of the main characteristics of a device is its irradiance. This is what makes a device powerful or not. A high irradiance means you stay less time standing in front of it. Low Irradiance devices will only make you lose your time. Let's understand what it is and what to look for when buying LED lights.

Understand the Concept

First, let's start with the pure definition of Irradiance, used by physicians.

" Irradiance is the flux of radiant energy per unit of surface. "

In other words, Irradiance is the power of a light at "X" distance. Another synonym would be light power output. It is mainly used to know where to place your solar panels. You want to have the most power on your solar panel to maximize efficiency.

Here is the unit used to calculate it: mW/cm². In words, it means Mill Watts per square meter. Do not confuse it with w/m².

Picture this: the Irradiance of the sun is higher in summer. In winter, the sun touches the earth at a different angle, thus his less powerful at sea level.

Average sun irradiance in winter is 100mW/cm².

Understand the Concept

First, let's start with the pure definition of Irradiance, used by physicians.

" Irradiance is the flux of radiant energy per unit of surface. "

In other words, Irradiance is the power of a light at "X" distance. Another synonym would be light power output. It is mainly used to know where to place your solar panels. You want to have the most power on your solar panel to maximize efficiency.

Here is the unit used to calculate it: mW/cm². In words, it means Mill Watts per square meter. Do not confuse it with w/m².

Picture this: the Irradiance of the sun is higher in summer. In winter, the sun touches the earth at a different angle, thus his less powerful at sea level.

Average sun irradiance in winter is 100mW/cm².

How do we know the Irradiance?

To know the irradiance of a light source, you need to have technology. A solar power meter is needed to get the data from the light. This is a scientific tool that can cost thousands of dollars. There is some amateur solar power meter available for people who are okay with not having laser precise data. We use this one on amazon, which is really reliable and affordable.


You simply point the device at the light and it gives you the data. It will give you in the format of w/m² and you need to convert it in mW/cm². Simply divide the number by 100 (or multiply by 0.1).


The closer you are from a device, the higher the irradiance will be, vice versa.

For example, at 6 inches, the device will be at 100mW/cm². At 12 inches, it will only be 60mW/cm².

How do we know the Irradiance?

To know the irradiance of a light source, you need to have technology. A solar power meter is needed to get the data from the light. This is a scientific tool that can cost thousands of dollars. There is some amateur solar power meter available for people who are okay with not having laser precise data. We use this one on amazon, which is really reliable and affordable.


You simply point the device at the light and it gives you the data. It will give you in the format of w/m² and you need to convert it in mW/cm². Simply divide the number by 100 (or multiply by 0.1).


The closer you are from a device, the higher the irradiance will be, vice versa.

For example, at 6 inches, the device will be at 100mW/cm². At 12 inches, it will only be 60mW/cm².

Why is it important?

Now we have the irradiance of a device in data. What do we do next? You might wonder why we would want to know this information. Here's why. Dosage and the time. When doing red light therapy, you should have a clear picture of how much time to stay and at which distance.

2 simple concepts to understand:

First, the light charges the cells with joules. Joule is a unit of measurement of energy almost like the calorie. When doing red light therapy with a rigorous / scientific approach, you want to know how much joules you are getting. Why? Because if you are looking for pain benefits (~60 joules), then you need way more joules than for skin benefits (~10 joules).

For example: 10 Joules, twice a week, for 10 weeks.

Now, how do we know how much joules we are getting? Easy! There is a simple formula.

At 100 mW/cm² x 60 seconds / 1000 = 6 Joules/cm².

This means that you gain 6 joules per minute when you are at 100mW/cm².

This all makes sense now, doesn't it? If you did not get it, you can always re-read this last paragraph.

Why is it important?

Now we have the irradiance of a device in data. What do we do next? You might wonder why we would want to know this information. Here's why. Dosage and the time. When doing red light therapy, you should have a clear picture of how much time to stay and at which distance.

2 simple concepts to understand:

First, the light charges the cells with joules. Joule is a unit of measurement of energy almost like the calorie. When doing red light therapy with a rigorous / scientific approach, you want to know how much joules you are getting. Why? Because if you are looking for pain benefits (~60 joules), then you need way more joules than for skin benefits (~10 joules).

For example: 10 Joules, twice a week, for 10 weeks.

Now, how do we know how much joules we are getting? Easy! There is a simple formula.

At 100 mW/cm² x 60 seconds / 1000 = 6 Joules/cm².

This means that you gain 6 joules per minute when you are at 100mW/cm².

This all makes sense now, doesn't it? If you did not get it, you can always re-read this last paragraph.

Irradiance of Red Light Therapy Devices

Some devices have really low powered LED chips. Common devices have 1W or 2W LEDs, and some even have as low as 0.5 W chips. More watts mean more light power. Our devices have 5W LED's, which makes them the most powerful on the market, compared to the Joovv (3 W) and other brands.

Irradiance of Our Devices

We have one of the highest irradiance on the market. Our main competitor (Joovv) as only 100mW/cm². Here is the full data chart of our devices at different distances. All data is in mW/cm²

Distance / Devices Mini Targeted Half-Body Full-Body Ultimate

At 0" / 0cm:

120

140

160

180

190

At 6" / 15cm:

76

110

121

136

140

At 12" / 30cm:

38

95

102

112

115

At 18" / 45cm:

18

60

76

93

97

At 24" / 60cm:

12

40

56

74

78

Irradiance of Red Light Therapy Devices

Some devices have really low powered LED chips. Common devices have 1W or 2W LEDs, and some even have as low as 0.5 W chips. More watts mean more light power. Our devices have 5W LED's, which makes them the most powerful on the market, compared to the Joovv (3 W) and other brands.

Irradiance of Our Devices

We have one of the highest irradiance on the market. Our main competitor (Joovv) as only 100mW/cm². Here is the full data chart of our devices at different distances. All data is in mW/cm²

Distance / Devices Mini Targeted Half-Body Full-Body Ultimate

At 0" / 0cm:

120

140

160

180

190

At 6" / 15cm:

76

110

121

136

140

At 12" / 30cm:

38

95

102

112

115

At 18" / 45cm:

18

60

76

93

97

At 24" / 60cm:

12

40

56

74

78

Knowing the Dosage & Time

We created a special tool that you can use to know how much time to get the dosage and at which distance. Click here to head hover the page.

What to look for?

Not all devices have therapeutic benefits. Some devices do not have the right spectrum or a therapeutic-grade irradiance. This can make you lose your time and money, if you don't know what to look for.

How to choose a device

Understand the main components of a device and compare with other brands.
SEE MORE

Why us?

Therapeutic-Grade Irradiance, Precise Spectrum, No EMFs and an Affordable Price Tag, What are you Waiting For? Comes With a 2 Years Warranty and a 30 Day Money-Back Guarantee.

Our Devices

From Targeted Treatment to Full-Body Therapy. Choose your Way.
SEE MORE

All About Light

Learn How Light is a Primal Factor in Human Biology and its Effects on our Body.

What to look for?

Not all devices have therapeutic benefits. Some devices do not have the right spectrum or a therapeutic-grade irradiance. This can make you lose your time and money, if you don't know what to look for.

How to choose a device

Understand the main components of a device and compare with other brands.
SEE MORE

Why us?

Therapeutic-Grade Irradiance, Precise Spectrum, No EMFs and an Affordable Price Tag, What are you Waiting For? Comes With a 2 Years Warranty and a 30 Day Money-Back Guarantee.

Our Devices

From Targeted Treatment to Full-Body Therapy. Choose your Way.
SEE MORE