“Does the LightSheer Duet not work for hair removal?”
“What are the features, advantages, and disadvantages of the LightSheer Duet?”
If you have questions like these, read on.
The LightSheer Duet is a type of medical laser hair removal device. It uses a thermal-destruction diode laser to target melanin in the hair follicle, minimizing stress on the skin while addressing a wide range of hair types.
On this page, we explain the LightSheer Duet’s hair removal results, the number of sessions needed to complete treatment, and its advantages and disadvantages.
Our clinic listens carefully to each patient’s concerns and conditions, then recommends a treatment plan tailored to the individual. Please book a consultation using the button below.
Table of Contents
- 1 What Is the LightSheer Duet? A Medical Hair Removal Device Developed by Lumenis
- 2 Does the LightSheer Duet Really Remove Hair? Understanding Its Hair Removal Effects
- 2.1 Thermal-Destruction Diode Laser Targets and Destroys Melanin in the Hair Follicle
- 2.2 Two Handpieces for Different Areas: The Cooling ET and the Suction HS
- 2.3 How Does Hair Fall Out After LightSheer Duet Treatment? When Does Shedding Begin?
- 3 Number of Sessions and Treatment Intervals to Complete Hair Removal with the LightSheer Duet
- 3.1 Sessions for Fine Hair on the Face and Back | Approximately 6–10 Sessions
- 3.2 Sessions for Beard, VIO, and Underarms | Approximately 5–8 Sessions
- 4 Features of the LightSheer Duet: 3 Advantages
- 4.1 Advantage ① Suitable for Both Coarse and Fine Hair
- 4.2 Advantage ② Suitable for Tanned or Naturally Darker Skin
- 4.3 Advantage ③ Wide Applicator Head Reduces Missed Spots and Shortens Treatment Time
- 5 Is the LightSheer Duet Painful? 2 Disadvantages
- 5.1 Disadvantage ① Hair Thickening (“Paradoxical Hypertrichosis”) May Rarely Occur
- 5.2 Disadvantage ② Some Areas May Experience Discomfort or Redness
- 6 Comparing the LightSheer Duet with Other Hair Removal Devices
- 6.1 Mediostar Next PRO | Hair Removal with Reduced Discomfort
- 6.2 GentleMax Pro | Equipped with Two Types of Lasers
- 6.3 GentleLase | Shorter Treatment Times
- 7 Frequently Asked Questions about the LightSheer Duet
- 7.1 Q. What output level does the LightSheer Duet operate at?
- 7.2 Q. Does the LightSheer Duet have skin-beautifying effects?
- 8 Summary: The LightSheer Duet Supports Hair Removal Across a Wide Range of Hair and Skin Types
What Is the LightSheer Duet? A Medical Hair Removal Device Developed by Lumenis
The LightSheer Duet is a medical laser hair removal device developed by Lumenis.
The LightSheer Duet was the world’s first laser hair removal device to receive FDA clearance in the United States for permanent hair reduction.
The U.S. FDA is the regulatory body equivalent to Japan’s Ministry of Health, Labour and Welfare, and devices must meet FDA quality standards to receive clearance.
Treatments can be performed by alternating between two handpieces — the ET and the HS — allowing each area to be addressed efficiently with the most suitable handpiece.
Does the LightSheer Duet Really Remove Hair? Understanding Its Hair Removal Effects
Many people wonder whether the LightSheer Duet actually works — or whether hair truly falls out after treatment.
In short, the LightSheer Duet is a device capable of permanent hair reduction.
However, hair does not shed immediately after the session. It grows to a certain length before falling out naturally, so shedding typically begins 1 to 3 weeks after treatment.
Below, we explain in detail how the LightSheer Duet works and what hair removal results you can expect.
Thermal-Destruction Diode Laser Targets and Destroys Melanin in the Hair Follicle
The LightSheer Duet is a hair removal device that uses a thermal-destruction diode laser.
It works by generating heat in response to the melanin in the hair follicle, destroying the follicle and thereby reducing hair growth.
The diode laser operates at a wavelength of 810 nm, which sits between the Alexandrite laser and the Nd:YAG laser. Because the energy level is not excessively high, the discomfort from laser irradiation is relatively mild.
Two Handpieces for Different Areas: The Cooling ET and the Suction HS
The LightSheer Duet uses two different handpieces during treatment. The details of each are as follows.
| ET Handpiece | HS Handpiece | |
|---|---|---|
| Mechanism | Cools the skin simultaneously with laser irradiation | Applies suction to the treatment area while delivering the laser |
| Suitable Areas | Areas with a smaller treatment surface (e.g., fingers, V-line) |
Areas with a larger treatment surface (e.g., abdomen, thighs) |
The ET handpiece is characterized by its simultaneous cooling and irradiation. By cooling the skin during laser delivery, it helps protect the skin and reduce discomfort during treatment.
The HS handpiece features a built-in suction function. By drawing the skin upward during irradiation, it helps reduce discomfort and lowers the risk of burns.
Because each handpiece is suited to different areas, using both in combination allows for hair removal across a wide range of body sites.
How Does Hair Fall Out After LightSheer Duet Treatment? When Does Shedding Begin?
After treatment with the LightSheer Duet, hair grows to a certain length before falling out naturally on its own.
The time until shedding varies between individuals — some experience hair loss within 1 to 2 weeks, while others may not notice shedding until around 3 weeks after the session.
For this reason, you may not notice results immediately after treatment.
Additionally, not all treated hairs will shed, so the absence of shedding in some hairs does not necessarily indicate that those areas were missed during irradiation.
Number of Sessions and Treatment Intervals to Complete Hair Removal with the LightSheer Duet
The pattern of hair shedding varies between individuals, and the number of sessions required also differs depending on the treatment area.
The time needed to complete hair removal can broadly be divided into the following two categories:
- Fine hair on the face and back
- Coarser hair such as beard, VIO, and underarms
Below, we explain the number of sessions required for each area in detail.
Sessions for Fine Hair on the Face and Back | Approximately 6–10 Sessions
For fine hair on the face and back, approximately 6 to 10 sessions with the LightSheer Duet are typically needed as a guideline.
Fine hair generally requires more sessions overall. Noticeable results tend to become apparent from around the 6th session, with approximately 10 sessions needed to complete the full course of treatment.
However, many patients notice that their skin feels smoother after 5 to 6 sessions, and in the case of facial hair removal, they also find that makeup applies more evenly.
As a general guide, facial hair removal is recommended approximately once a month, and back hair removal approximately every 1.5 to 2 months.
Sessions for Beard, VIO, and Underarms | Approximately 5–8 Sessions
The approximate number of sessions needed for beard, VIO, and underarm hair removal is as follows.
| Beard / VIO | 6–8 sessions |
|---|---|
| Underarms | Around 5 sessions |
Beard and VIO hair removal typically requires more sessions, with around 6 to 8 treatments needed before self-grooming becomes largely unnecessary.
For underarms, approximately 5 sessions are generally needed to complete the course of treatment.
Regarding treatment frequency with the LightSheer Duet, beard treatments are typically scheduled once a month, while underarm and VIO treatments are generally scheduled every 1.5 to 2 months.
Features of the LightSheer Duet: 3 Advantages
The advantages of the LightSheer Duet include the following:
- Suitable for both coarse and fine hair
- Suitable for tanned or naturally darker skin
- Wide applicator head reduces missed spots and shortens treatment time
Below, we explain each of the three advantages of the LightSheer Duet in detail.
Advantage ① Suitable for Both Coarse and Fine Hair
The LightSheer Duet can treat both coarse and fine hair.
The LightSheer Duet allows the pulse width (irradiation duration) to be selected within a range of 5 to 400 ms. Because both pulse width and wavelength can be adjusted across a wide range, the device can be calibrated to match the thickness of the hair and the tone of the skin.
The LightSheer Duet also operates at a wavelength of 805 nm — longer than many other devices — which is a distinguishing feature. This allows it to address everything from dense unwanted hair in the VIO area and beard to fine facial hair.
Advantage ② Suitable for Tanned or Naturally Darker Skin
The LightSheer Duet can be used on tanned skin and naturally darker skin tones.
With conventional laser hair removal, treating tanned or darker skin carried a significant risk of burns, and in some cases treatment was not possible.
The LightSheer Duet uses a longer laser wavelength that is less reactive to the melanin in the skin itself. As a result, the risk of burns can be reduced even for skin with higher melanin levels.
However, in cases of very heavy tanning or particularly dark skin tones, there may still be a risk of burns, and treatment may not be possible. Please consult with a physician first to determine whether treatment is appropriate for you.
Advantage ③ Wide Applicator Head Reduces Missed Spots and Shortens Treatment Time
The LightSheer Duet is characterized by fewer missed spots and shorter treatment times.
Of the two handpieces, the HS handpiece features a large 22 × 35 mm applicator head, enabling fast treatment over wide areas. In addition, the square shape of the applicator head — rather than a circular one — is another reason the risk of missed spots is reduced.
Many patients find the duration of hair removal sessions uncomfortable, so the ability to shorten treatment time through efficient delivery is a meaningful benefit.
Is the LightSheer Duet Painful? 2 Disadvantages
The disadvantages of the LightSheer Duet include the following:
- Hair thickening (“paradoxical hypertrichosis”) may rarely occur
- Some areas may experience discomfort or redness
Discomfort is generally milder compared to other devices, but some individuals may still find the sensation uncomfortable depending on the hair removal method and their personal sensitivity.
Below, we explain each of the two disadvantages of the LightSheer Duet in detail.
Disadvantage ① Hair Thickening (“Paradoxical Hypertrichosis”) May Rarely Occur
In rare cases, a phenomenon known as “paradoxical hypertrichosis” may occur with LightSheer Duet treatment.
Paradoxical hypertrichosis refers to a condition in which hair becomes thicker and darker following medical hair removal. Fine or vellus hairs are particularly susceptible to this change.
The precise cause of paradoxical hypertrichosis has not been fully established. If you notice any change in hair thickness after treatment, please consult your physician.
Adjustments such as increasing the output level may be made to address the condition.
Disadvantage ② Some Areas May Experience Discomfort or Redness
Depending on the treatment area, the LightSheer Duet may cause discomfort or redness in some cases.
Individual sensitivity to discomfort varies, but areas close to bone and areas with coarser hair tend to be more sensitive.
Redness may also appear after treatment with the LightSheer Duet; however, in most cases this subsides within 1 to 2 hours.
Comparing the LightSheer Duet with Other Hair Removal Devices
The table below summarizes the differences between the LightSheer Duet and other hair removal devices.
| LightSheer Duet | Mediostar Next PRO | GentleMax Pro | GentleLase | |
|---|---|---|---|---|
| Laser Type | Diode laser | Diode laser | ・Alexandrite laser ・Nd:YAG laser |
Alexandrite laser |
| Hair Removal Method | Thermal destruction | Heat accumulation | Thermal destruction | Thermal destruction |
| Features | Can deliver laser with suction applied to the hair | Suitable for fine hair and darker skin tones | Can address hair affected by paradoxical hypertrichosis | No cooling gel required |
| Discomfort | Mild | Very mild | Mild | Mild |
Below, we take a closer look at each hair removal device.
Mediostar Next PRO | Hair Removal with Reduced Discomfort
The Mediostar Next PRO is a laser hair removal device characterized by its ability to treat hair with reduced discomfort.
Unlike the LightSheer Duet’s thermal-destruction method, the Mediostar Next PRO uses a heat-accumulation (diode) approach.
While the thermal-destruction method targets melanin in the hair follicle directly, the heat-accumulation Mediostar Next PRO works by delivering damage to the bulge region to achieve hair reduction.
The thermal-destruction method delivers direct damage to the hair follicle and can therefore cause more noticeable discomfort. The heat-accumulation method, by contrast, uses lower energy output, so discomfort is generally less pronounced — though results may take longer to become apparent.
Those who wish to notice hair reduction results sooner may find the LightSheer Duet more suitable, while those who prioritize minimizing discomfort may prefer the Mediostar Next PRO.
GentleMax Pro | Equipped with Two Types of Lasers
The GentleMax Pro is distinguished by its dual-laser system.
By alternating between the following two laser types, the device can address a wide variety of hair types:
- Alexandrite laser
- Nd:YAG laser
The GentleMax Pro also features a skin cooling system that delivers a burst of cooling gas in sync with each laser pulse, helping to protect the skin and reduce the risk of discomfort and burns during treatment.
GentleLase | Shorter Treatment Times
The GentleLase is a hair removal device capable of completing treatments in a shorter timeframe.
The GentleLase is equipped with a cooling system. Because no cooling gel needs to be applied before treatment, session times can be kept shorter.
There are also two versions of the GentleLase: the original first-generation model and the next-generation GentleLase Pro. The differences between them are as follows.
| GentleLase | GentleLase Pro | |
|---|---|---|
| Laser Type | Thermal-destruction Alexandrite laser | Thermal-destruction Alexandrite laser |
| Spot Size | Up to 16 mm | Up to 24 mm |
| Irradiation Speed | 1 shot per second | 2 shots per second |
Since the GentleLase and GentleLase Pro use the same type of laser, there is no significant difference in hair removal outcomes between the two.
However, compared to the GentleLase, the GentleLase Pro offers a 1.5× larger spot size and twice the irradiation speed, enabling faster, more efficient treatment sessions.
Frequently Asked Questions about the LightSheer Duet
Below, we address some frequently asked questions about the LightSheer Duet.
Q. What output level does the LightSheer Duet operate at?
The output levels of the LightSheer Duet are as follows.
| Handpiece | Output (J/cm²) |
|---|---|
| ET Handpiece | 10–100 J |
| HS Handpiece | 4.5–12 J |
Higher output does not automatically translate to better hair removal results with laser devices. The LightSheer Duet uses two different handpieces to enable treatment at an output level appropriate for the intended area and purpose.
The HS handpiece also delivers laser energy while applying suction to the skin, bringing the skin surface closer to the hair follicle and allowing efficient hair reduction at lower output levels.
Q. Does the LightSheer Duet have skin-beautifying effects?
The LightSheer Duet does not have direct skin-beautifying effects.
Some hair removal devices may offer benefits for concerns such as acne scars, pigmentation, or darkened pores, and a different device may be more suitable if skin improvement is a primary goal.
That said, hair removal can help reduce skin roughness and enlarged pores caused by self-grooming, which may contribute to an overall improvement in skin appearance over time.
Summary: The LightSheer Duet Supports Hair Removal Across a Wide Range of Hair and Skin Types
The LightSheer Duet is a type of medical laser hair removal device that can address hair removal across a wide range of areas while minimizing stress on the skin and keeping treatment times shorter.
The key advantages of hair removal with the LightSheer Duet are the following three:
- Suitable for both coarse and fine hair
- Suitable for tanned or naturally darker skin
- Wide applicator head reduces missed spots and shortens treatment time
The LightSheer Duet is able to address hair removal scenarios that were challenging with conventional laser devices, including fine hair, tanned skin, and naturally darker skin tones.
If unwanted hair has been a concern but your hair or skin type has made treatment seem difficult, please consider exploring hair removal with the LightSheer Duet.
Our clinic listens carefully to each patient’s concerns and conditions, then recommends a treatment plan tailored to the individual. Please book a consultation using the button below.
