Why Choose This 311nm NB-UVB Phototherapy Lamp

• Targeted 311nm NB-UVB Phototherapy
  Delivers narrowband UVB within the 311–312nm spectral range for localized phototherapy.
• 20 mW/cm² Irradiation Intensity
  Provides controlled UVB output for targeted treatment of localized skin areas.
• 55 cm² Treatment Area
  Covers localized lesions efficiently while remaining compact enough for precise treatment.
• Philips UVB Light Source
  Uses a Philips UVB lamp with a rated light-source lifespan of up to 1,000 hours.
• Detachable Comb for Scalp Treatment
  Helps separate the hair and maintain appropriate spacing between the lamp and treatment area.
•  Built-In Timer & LCD Display
  Set and monitor irradiation time directly on the handheld device for more controlled treatment sessions.

Specification

Model	KN-4003BL
Light Source	311nm Narrow Band UVB Light
Power	AC 100-240V 50/60HZ | 160 VA
Irradiated Area	55 cm² ± 10%
Irradiation Intensity	20 mW / cm²
Spectral Range	UVB：311～312 nm
Peak Wavelength	311 nm
Light Life Span	1000 Hours
Indication	Vitiligo; Psoriasis; Eczema; Pityriasis Rosea
Certification	ISO 9001:2008 | ISO 13485:2003 |  FDA 510(k) Cleared (No. K181805) | CE
Net Weight	0.82 kg
Warranty	2 Years

USD $299 vs. USD $375 — Which 311nm UVB Lamp Is Right for You

	USD $299 — KN-4003BL	USD $375 — KN-4006B (click here to check)
Light Type	311nm Narrowband UVB	311nm Narrowband UVB
Irradiation Intensity	20 mW/cm²	20 mW/cm²
Irradiation Area	55 cm² ±10%	104 cm² ±10%
Light Source	Philips 311nm NB-UVB Lamp	Philips 311nm NB-UVB Lamp
Timer Function	✓ Yes	✓ Yes
Key Design Difference	Detachable comb helps separate hair and maintain spacing during treatment, making it especially convenient for scalp and hair-covered areas.	Detachable treatment handle can be removed from the main unit for handheld treatment or placed back onto the host for hands-free irradiation.
Best for Lesion Size	Localized areas smaller than approximately one palm	Larger localized areas greater than approximately one palm
Best Treatment Areas	Scalp and smaller localized areas on the body	Larger areas on the arms, legs, back, abdomen and other body areas
Recommended If…	Choose this model if your main concern is smaller patches or scalp lesions, and you want a more compact and lower-cost option.	Choose this model if you frequently need to treat larger patches and want a wider irradiation area with more flexible handheld or hands-free use.

• The main difference is coverage and treatment flexibility — not irradiation intensity.

Both models deliver 20 mW/cm² 311nm narrowband UVB with a Philips light source and timer function. Choose the $299 model for smaller localized areas and scalp treatment with its detachable comb, or the $375 model for larger treatment areas and more flexible handheld or hands-free irradiation.

Philips 311nm NB-UVB Light Source

Equipped with a Philips narrowband UVB lamp delivering a peak wavelength of 311nm. The light source provides stable UVB output with a rated lifespan of up to 1,000 hours, reducing the need for frequent lamp replacement.

Clear LCD Treatment Display

The built-in LCD screen clearly displays treatment time and operating status, allowing users to monitor each phototherapy session directly from the handheld device.

Built-In Timer for Controlled Treatment

Set the irradiation time before each session. The device automatically stops irradiation when the preset time is reached, helping users follow their recommended phototherapy schedule more consistently.

Detachable Comb for Scalp & Hair-Covered Areas

The detachable comb helps separate hair and maintain spacing between the UVB lamp and treatment area, making targeted phototherapy more convenient for the scalp and other hair-covered areas.

Remove the comb when treating appropriate exposed skin areas, or attach it when additional spacing and hair separation are needed.

55 cm² Targeted Treatment Area

The 55 cm² ±10% irradiation area is designed for targeted treatment of smaller localized skin areas while maintaining a compact and portable handheld design.

Lightweight & Portable for Home Use

Weighing only 1.63 lbs (0.82 kg), the compact handheld design makes the device easy to hold, position and use for targeted phototherapy at home.

Application

Customer Treatment Examples

Examples shared by previous users. Individual responses to NB-UVB phototherapy may vary depending on the condition, treatment protocol, frequency and other individual factors.

Packing List

Important Safety Information

• Always wear the included UV-protective goggles before starting phototherapy. Treatment time and frequency should be determined according to individual skin condition and professional guidance.
• Before use, consult a dermatologist or qualified healthcare professional if you have a photosensitivity disorder, are taking photosensitizing medications, have other conditions that may affect UV sensitivity, or are unsure whether NB-UVB phototherapy is appropriate for you.
• After treatment, protect the treated area from unnecessary sun exposure and follow appropriate physical sun-protection measures.

FAQs