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Kernel KN-4003BL2 UVB Lamp – professional narrowband UVB phototherapy with OLED display for precise home treatment
The Kernel KN-4003BL2 uses a genuine Philips PL-S 9W/01/2P 311 nm narrowband UVB bulb – the clinically validated spectrum for targeted treatment of vitiligo, psoriasis and eczema at home.
- Vitiligo – stimulates the remaining pigment cells in and around the white patches, so the skin can gradually produce its own color again.
- Psoriasis – slows the overly fast growth of skin cells and calms inflammation, helping reduce scaling, redness and plaque thickness.
- Eczema – calms the overactive immune response in the skin, easing itching and inflammation.
Precise control: the OLED display and microcomputer timer let you set the exact treatment time, with an automatic shut-off. An integrated reflector directs the UVB output for focused, consistent application, and the removable comb attachment makes scalp and hard-to-reach areas easy to treat.
Want to see all the specifications? Open the Parameters tab →
Why customers choose Kernel KN-4003BL2
The Kernel KN-4003BL2 is ideal for treating small to medium-sized patches – from a single patch on the face to larger areas on the arms, legs or torso, which you simply treat section by section. The comb attachment keeps the correct 3 cm distance and brings the light through the hair to the scalp, which makes it especially practical for scalp psoriasis and hard-to-reach spots such as elbows, knees and hairline.
A certified medical device – see the certificates →
How UVB phototherapy works
An overactive immune response in the skin can contribute to inflammation or damage pigment-producing cells, depending on the condition.
Narrowband UVB light acts mainly in the upper layers of the skin, helping regulate local immune activity.
With a prescribed course of treatment, UVB may reduce redness, scaling and itching in psoriasis and eczema. In vitiligo, it can also stimulate remaining pigment cells and support repigmentation.
Illustration is simplified. Results vary by condition and individual. UVB phototherapy should follow medical guidance.
How to use Kernel KN-4003BL2
- Connect the power adapter and switch the unit on.
- Use the OLED display and microcomputer timer to set the exact treatment duration.
- First session: adults 30 seconds, children 15 seconds.
- Treat 2–3 times per week, at least one full day apart, and only when any redness from the previous session has fully subsided.
- Keep the 3 cm treatment distance – the comb head maintains it automatically and parts the hair for scalp treatment.
Check your skin 6–8 hours after exposure:
| No redness | Increase the exposure time by 20 seconds at the next session. |
|---|---|
| Mild rednessdesired response | Still slightly pink after 24 hours? Keep the same time and wait until it has completely faded before treating again. |
| Marked redness | Pause until the skin is back to normal, then reduce the exposure time by 20%. |
Typical exposure per spot: about 3–4 minutes, depending on skin type.
Read the full light therapy guide → or find more answers in the FAQWant a personalised assessment and a complete treatment plan?
Take the short quiz →Technical Specifications
| Device specifications | |
|---|---|
| Parameter | Value |
| Model | Kernel KN-4003BL2 |
| Spectrum | NB-UVB 311 nm ± 3 nm |
| Light source | 1× Philips PL-S 9W/01/2P UVB lamp |
| Lamp power | 9 W |
| Rated power | 50 W |
| Irradiation area | 55 cm² ± 10% |
| Working distance | 3 cm ± 0.5 cm |
| Display | OLED |
| Max exposure | 30 minutes |
| Enclosure | IP22 |
| Dimensions | 330 × 58.5 × 61.5 mm |
| Power supply | 120V / 60Hz (US plug) |
| Weight | 905 g |
| Warranty | 1 year |
| Manufacturer | Kernel Medical Equipment Co., Ltd. |
Package Contents
What is Included
| ① | Kernel KN-4003BL2 NB-UVB phototherapy unit |
| ② | Comb attachment for scalp treatment |
| ③ | Safety goggles |
| ④ | Power cable |
| ⑤ | User manual |
Certifications & Regulatory Compliance
The Kernel KN-4003BL2 is a certified medical device manufactured by Kernel Medical Equipment Co., Ltd. The device meets international quality and safety standards for medical phototherapy equipment.
Certificate Documents
Frequently Asked Questions
Answers to the most common questions about using the Kernel KN-4003BL2 for vitiligo and psoriasis phototherapy at home.
Is the Kernel KN-4003BL2 a Philips lamp?
The device is manufactured by Kernel Medical Equipment, but it uses a genuine Philips PL-S 9W/01/2P narrowband UVB bulb — the same lamp found in clinical phototherapy units. This ensures authentic 311 nm output.
Is the Kernel KN-4003BL2 suitable for scalp psoriasis?
Yes. The included comb attachment is designed to part the hair and bring the 311 nm NB-UVB light closer to the scalp, while also maintaining the correct 3 cm treatment distance. Always wear the supplied UV-protective goggles.
How often should I use the KN-4003BL2 for psoriasis?
Treat 2–3 times per week with at least 48 hours between sessions. Do not treat the same area more than once per day. Only increase exposure time when any redness from the previous session has completely settled.
Can I combine the KN-4003BL2 with topical psoriasis creams?
Yes. Many patients use NB-UVB alongside topical treatments. Apply neutral moisturizers after each session once the skin has cooled. Some active ingredients (corticosteroids, retinoids, salicylic acid) may increase photosensitivity — always follow your dermatologist's advice.
Is the Kernel KN-4003BL2 suitable for vitiligo?
Yes. The KN-4003BL2 uses 311 nm narrowband UVB — the standard wavelength used in dermatology clinics for vitiligo phototherapy. It is designed for treating small to medium-sized patches on the face, hands and body.
How often should I use the KN-4003BL2 for vitiligo?
Use 2–3 times per week with at least 48 hours between sessions. Increase exposure time only when the skin has fully recovered and there is no persistent redness from the previous session.
How long does repigmentation take?
Repigmentation is gradual. Many patients need at least 2–3 months to see the first pigment freckles, and meaningful improvement often takes 6–12 months. Face and neck tend to respond faster than hands and feet. Consistency is key.
What does the OLED display show?
The OLED screen displays the current timer setting and remaining treatment time. The microcomputer timer automatically shuts the device off when the set time is reached, preventing accidental overexposure.
Can I use the KN-4003BL2 on my face?
Yes, targeted NB-UVB can be applied to facial areas. Always wear the supplied UV-protective goggles and never look directly at the UVB light. Keep the exposure time short and increase gradually.
Is NB-UVB therapy suitable for children?
Yes, but only under pediatric dermatology supervision and with individually adjusted exposure times. The starting time for children is 15 seconds.
$402.50
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