CULE-20QS-XEG-BLue Light Treatment for Acne

Data Sheets

• XLamp Element G Feature Sheet
• XLamp Element G Data Sheet
• Optimising 4 Channel Led Design with XEG

Note  Cree LED maintains a tolerance of ±7% on flux and power measurements, ±0.005 on chromaticity (CCx, CCy) measurements and a tolerance of ±2 on CRI measurements. See the Measurements section (page 97).

• XLamp XE-G LED order codes specify only a minimum flux bin and not a maximum. Cree LED may ship reels in flux bins higher than the minimum specified by the order code without advance notice. Shipments will always adhere to the chromaticity or DWL bin restrictions specified by the order code.

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MCPCB-XEG-Q20-CU

$4.61 EX GST

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MCPCB-XEG-L280-AL

$6.61 EX GST

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MCPCB-XEG-TRI20-CU. Copper Base MCPCB for XEG LED’s with High Thermal Conductivity

$2.61 EX GST

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MCPCB-XEG-20-CU

$2.61 EX GST

Applications

Blue Light Therapy for Acne Treatment

Blue light therapy is a non-invasive treatment for acne that uses light in the blue wavelength range to kill the Propionibacterium acnes bacteria found in the skin, a major cause of inflammation in acne.

The specific range of blue light used in therapy typically falls between 415-420 nm. This range has been found to be particularly effective in activating a certain type of molecule called porphyrins that exist in the P. acnes bacteria. When these porphyrins are activated, they release free radicals that kill the bacteria.

The effectiveness of blue light therapy can depend on the intensity of the light (measured in mW/cm^2), the duration of exposure, and the total energy delivered (measured in J/cm^2). The radiant power of the light source, which is the total energy emitted per unit of time, is also a key factor. Higher radiant power will deliver more energy over the same period of time.

In a typical blue light therapy session for acne, a patient might be exposed to the light for about 15-30 minutes. The therapy is generally painless, but some patients might experience minor side effects like temporary skin redness or dryness.

It’s important to note that while blue light therapy can be effective in reducing P. acnes bacteria and improving mild to moderate acne, it doesn’t prevent the underlying causes of acne, such as excess oil production or clogged pores. Therefore, it’s often used in combination with other treatments.

Also, because blue light can potentially cause damage to the eyes, it’s important to use eye protection during treatment. And while the blue light used in therapy is generally safe for the skin, it’s still a good idea to protect the skin from excessive exposure.

Finally, while there are many at-home blue light devices available, they may not deliver the same level of energy as professional devices used in a clinical setting. Therefore, the results may vary. As always, it’s best to consult with a healthcare provider or dermatologist to determine the best treatment plan for acne.

Fundamentals of Blue Light for Acne

To calculate the intensity of light (measured in mW/cm^2), the duration of exposure, and the total energy delivered (measured in J/cm^2), we need more information than just the radiant intensity of the LEDs. Here’s why:

1. Intensity of Light (mW/cm^2): To calculate this, we need to know the area over which the light is spread. Intensity is defined as power per unit area. If you have the total power (in this case, the radiant intensity of the LEDs) and the area over which it’s spread, you can calculate the intensity. However, without knowing the area, we can’t calculate the intensity.
2. Duration of Exposure: This is typically determined based on the specific application and the desired outcome. For example, in a therapeutic setting, the duration of exposure to LED light might be determined based on clinical studies or guidelines. Without knowing more about the specific application, it’s not possible to determine the appropriate duration of exposure.
3. Total Energy Delivered (J/cm^2): Energy is power multiplied by time. So, to calculate the total energy delivered, we need to know the total power (which we have) and the total time of exposure (which we don’t have). Even if we knew the time, we would still need to know the area over which the light is spread to calculate the energy per unit area.

How to use

To calculate the intensity of light (measured in mW/cm^2) and the total energy delivered (measured in J/cm^2), we’ll need to make some assumptions about the size of an adult face. Let’s assume the area of an adult face is approximately 400 cm^2, which is a rough estimate and can vary from person to person.

1. Intensity of Light (mW/cm^2): The total radiant intensity of our 4 LED engine is 1500 mW * 4 = 6000 mW or 6 W. If we assume this power is spread evenly over an area of 400 cm^2, the intensity would be:

   Intensity = Power / Area = 6 W / 400 cm^2 = 0.015 W/cm^2 or 15 mW/cm^2

2. Total Energy Delivered (J/cm^2): Energy is power multiplied by time. First, we need to convert the time of exposure from minutes to seconds because the standard unit of energy (joule) is in terms of seconds: 15 minutes = 900 seconds. Then we can calculate the total energy delivered:

   Energy = Power * Time = 6 W * 900 s = 5400 J

   This is the total energy delivered to the entire face. To find the energy per unit area, we divide by the area:

   Energy/Area = 5400 J / 400 cm^2 = 13.5 J/cm^2

So, for a 15-minute exposure with this 4 LED engine, the intensity of the light would be approximately 15 mW/cm^2, and the total energy delivered would be approximately 13.5 J/cm^2.

Please note that these calculations are based on the assumption that the light from the LEDs is spread evenly over the entire face, which may or may not be the case in a real-world application. The actual intensity and energy delivered could be higher or lower depending on how the light is distributed.

Safety

The safety of light exposure in terms of energy density (J/cm^2) can depend on several factors, including the wavelength of the light, the duration of the exposure, the specific application, and the individual’s sensitivity to light.

For LED light therapy, which is a common application where these measurements are relevant, typical energy densities range from 1 to 60 J/cm^2, depending on the specific treatment. For example, treatments for skin conditions like acne or anti-aging might use lower energy densities (around 1-10 J/cm^2), while treatments for pain or wound healing might use higher energy densities (up to 60 J/cm^2).

In the case of the 13.5 J/cm^2 exposure rated power of this engine, this falls within the typical range used in LED light therapy and would likely be considered safe for many applications. However, it’s important to note that safety can also depend on other factors not included in this calculation, such as the specific wavelengths of the LEDs and the individual’s skin type and sensitivity.

As always, any type of light therapy should be administered under the guidance of a healthcare provider or a trained professional who can assess the individual’s specific needs and sensitivities. It’s also important to use appropriate eye protection during any type of light therapy to prevent potential damage to the eyes.

Medical Therapy: LED Light Applications

LED light therapy, also known as phototherapy or photobiomodulation, is a non-invasive treatment that uses specific wavelengths of light to stimulate, heal, regenerate, and protect tissue. The therapy has been used for a variety of medical conditions and health issues.

1. Skin Conditions: LED light therapy is used to treat a variety of skin conditions. Blue LED light, typically around 415 nm, is used to treat acne because it can kill Propionibacterium acnes, the bacteria that causes acne. Red LED light, typically around 630-660 nm, is used for anti-aging treatments because it can stimulate collagen production, reducing the appearance of wrinkles and fine lines. It’s also used to treat rosacea and reduce inflammation and redness. Near-infrared light, typically around 800-900 nm, can be used to promote wound healing and tissue repair.

2. Seasonal Affective Disorder (SAD): SAD is a type of depression that’s related to changes in seasons, typically starting in the Autumn(Fall) and continuing into the winter months. Light therapy has been shown to be effective in treating SAD. Patients are exposed to a bright light from a “light box” for a certain amount of time each day. The light box emits a controlled amount of white light, with harmful ultraviolet (UV) light filtered out.

3. Pain Management: LED light therapy can be used for pain management. Near-infrared light can penetrate deep into the body, promoting healing and providing relief from pain caused by conditions like osteoarthritis, muscle pains, neuropathy, and other types of chronic pain.

4. Hair Growth: Certain wavelengths of light can stimulate hair growth in people with androgenetic alopecia, a common form of hair loss. Red light, typically around 630-660 nm, is used in these treatments.

5. Mood and Sleep Disorders: Exposure to white LED light at specific times can help regulate the body’s circadian rhythm, which can improve sleep disorders and other conditions related to circadian rhythm disruption.

6. Traumatic Brain Injury and Stroke: Some studies suggest that LED light therapy can help improve outcomes in patients with brain injuries or stroke. The light is thought to stimulate the repair and regeneration of damaged neurons.

It’s important to note that while LED light therapy can be effective for these and other conditions, it’s not a cure-all and should be used under the guidance of a healthcare provider. The effectiveness of the treatment can vary depending on the specific condition, the severity of the condition, and the individual patient.

If you want a custom Led Product for medical Light based solutions please contact us as we have many standard products or can design products to meet these requirements