.jpg){kind=logo}
KERNEL KN-4003BL2 UVB Lamp – 311 nm narrowband UVB phototherapy with OLED timer and Philips 9W bulb
A more advanced handheld option for people who want precise, convenient home phototherapy without moving to a large treatment unit. The KERNEL KN-4003BL2 combines a Philips PL-S 9W/01/2P narrowband UVB bulb with a clear OLED display, built-in treatment timer, integrated reflector and comb attachment.
Suitable for targeted NB-UVB phototherapy for:
- Vitiligo
- Psoriasis
- Atopic eczema
- Other UV-responsive skin conditions when recommended by a healthcare professional
.jpg)
Why Choose the KERNEL KN-4003BL2?
311 nm Philips NB-UVB
Uses a Philips PL-S 9W/01/2P narrowband UVB lamp with a peak wavelength of approximately 311 nm – the wavelength commonly used in dermatology phototherapy for vitiligo and psoriasis.
OLED Display + Timer
The integrated OLED screen and microcomputer timer make it easier to set and monitor each treatment session accurately, with a maximum programmable exposure time of 30 minutes.
55 cm² Treatment Area
A treatment window of approximately 55 cm² allows efficient targeted exposure of individual patches while keeping the device compact enough for home use and travel.
Comb Attachment for the Scalp
The comb helps separate hair and maintain the recommended treatment distance, making the unit practical for scalp psoriasis and other areas where hair can block UVB light.
Integrated Reflector
The internal reflector helps direct the UVB output towards the treatment area for more controlled, consistent application.
Built for Regular Home Use
Mains powered from 100–240 V, compact, easy to handle and protected by an IP22-rated enclosure. The KN-4003BL2 is the mains-powered version of the 4003BL2 series.
A Step Up in Treatment Control
If you want the simplest possible handheld UVB lamp, the BU-1S remains a straightforward option. The KN-4003BL2 is designed for users who prefer more control during regular long-term treatment, thanks to its display, timer and more structured interface.
The key difference is convenience and treatment control – not a different therapeutic wavelength. Both models use 311 nm narrowband UVB technology with a Philips 9W UVB light source.
Designed for Convenient Home Phototherapy
Technical Specifications
| Model | KERNEL KN-4003BL2 |
| Phototherapy type | Narrowband UVB (NB-UVB) |
| Light source | 1 × Philips PL-S 9W/01/2P UVB lamp |
| Peak wavelength | 311 nm ± 3 nm |
| Lamp power | 9 W |
| Irradiation area | 55 cm² ± 10% |
| Recommended working distance | 3 cm ± 0.5 cm |
| Display | OLED |
| Maximum exposure setting | Up to 30 minutes |
| Power supply | AC 100–240 V, 50/60 Hz |
| Rated power | 50 VA |
| Dimensions | 330 × 58 × 46.5 mm; with comb: 330 × 58.5 × 61.5 mm |
| Enclosure protection | IP22 |
| Manufacturer | Kernel Medical Equipment Co., Ltd. |
What Is Included?
- KERNEL KN-4003BL2 NB-UVB phototherapy unit
- Comb attachment for scalp treatment and treatment-distance control
- Power adapter
- UV-protective goggles
- User manual
- Original product packaging
Preparing for Your First Session
- Use the lamp only for a confirmed diagnosis and follow the device instructions or the treatment plan recommended by your healthcare professional.
- Connect the power supply, switch the unit on and wear suitable UV-protective goggles where required.
- Keep the treatment head at the recommended distance of approximately 3 cm. The comb attachment can help maintain this distance.
- For the standard starting protocol, the initial exposure is 30 seconds for adults and 15 seconds for children. Children should use phototherapy only with appropriate medical supervision.
Directions for Use
- Treat 2–3 times per week, leaving at least 48 hours between sessions.
- Only treat when any redness (erythema) from the previous session has subsided and the skin has fully recovered.
A desired skin reaction (erythema – slight redness) typically appears 6–8 hours after UVB exposure:
- No redness: increase the exposure time by 20 seconds at the next session.
- Mild redness: if it clears within 24 hours, increase the exposure by 20 seconds at the next session.
- Noticeable redness (desired response): if the skin is still slightly pink after 24 hours, keep the same exposure time and wait until the redness has completely faded before treating again.
- Strong redness: pause treatment until the skin has returned to normal, then reduce the exposure time by 20%.
- The typical exposure per spot is approximately 3–4 minutes, depending on skin type.
Following the protocol?
For vitiligo, our current protocol combines regular NB-UVB phototherapy with a structured treatment routine and skin-response monitoring. For psoriasis, follow the psoriasis-specific routine and any prescribed treatment exactly as directed by your clinician.
View the Vitiligo Treatment Protocol → View the Psoriasis Treatment Guide →
Frequently Asked Questions – KERNEL KN-4003BL2
The KERNEL KN-4003BL2 is a practical choice for anyone looking for targeted 311 nm NB-UVB treatment with more precise session control. It keeps the Philips narrowband UVB light source while adding the convenience of a modern display, timer, reflector and scalp comb in one compact handheld device.
£295
New comment