Kernel Corded, Handheld 311nm UVB Lamp, Light Intensity 4.5 mW/cm² – KN4003BL – Efficient Skin and Scalp Light Therapy

The use of 311nm narrowband ultraviolet B (NB-UVB) light has been clinically proven and used for nearly 12 decades as an effective treatment for various skin conditions, including:

• Psoriasis
• Vitiligo
• Eczema
• Parapsoriasis
• Atopic dermatitis
• Pityriasis rosea

Experience medical-grade phototherapy sessions in the comfort of your home. This device helps accelerate healing and relieve the unpleasant symptoms associated with various skin conditions.

• Suppressing the cutaneous cell-mediated immune response
• Speed up skin re-pigmentation
• Reduce itching, swelling and inflammation
• Smooth and shrink raised red, scaly or patches

Key Features

- Cost-effective, medical-grade UVB lamp

Equipped with a Philips 311nm NB-UVB bulb, KN4003BL offers entry-level home phototherapy for treating smaller areas such as the face, neck, hands, and feet.

- Corded design

No need to charge—just plug it in and enjoy consistent light therapy at home or while traveling in the U.S.

- Ideal for scalp treatment

Includes a removable hair attachment that parts the hair, allowing UV light to effectively reach the scalp

Treatment Guidelines for Phototherapy

NB-UVB Phototherapy Treatment Session and Frequency

NB-UVB Phototherapy Dose Guidelines by Body Area

Initial Dose

• Psoriasis: 300 mJ/cm², 
• Vitiligo: 150-200 mJ/cm² 

Instruction for Use

Pre-Treatment Steps:

1. Bathing: Take a 15-20 minute bath to remove skin scales.

2. Determine MED: Minimum Erythema Dose (MED) must be calculated before treatment.

• Kernel KN4003BL Lamp Intensity: 4.5 mW/cm²
• MED Formula: Irradiation Time (seconds)=Dose (mJ/cm²) ÷ Lamp Intensity (mW/cm²)

Dose Adjustment Guidelines:

A. No Erythema or Previous Erythema Resolved:

• Increase dose by 20-25%.

B. Mild Erythema:

• Maintain the same dose or increase by 10%.
• If resolved, follow "A."

C. Asymptomatic Shiny Erythema:

• Skip one treatment and resume with the same dose.
• Gradually increase by 10% for subsequent sessions.

D. Painful Erythema with Edema or Blisters:

• Stop treatment until recovery.
• Resume at half the previous dose.

Important Consideration

• Always use protective eyewear during the treatment.
• Document the dosage and monitor your skin’s response after each session to adjust dosing appropriately.
• Consult with a dermatology professional before starting or modifying phototherapy treatments.

Business Transparency

Kernel, founded in 1997, is dedicated to research, development, and manufacturing in the high-tech medical equipment industry, with leading innovations in UV phototherapy devices, colposcopes, and PDT photodynamic therapy devices. Headquartered in Jiangsu, China, Kernel has offices in more than 30 countries and regions worldwide and is widely praised for its quality, effectiveness, and after-sales service. Kernel's products have been approved by the FDA, CE, and ISO 9001. Ahead of its peers in the medical equipment field, Kernel is also a supplier to the United Nations. 

14-Day Return Policy

• Customers may return eligible products within 14 days of delivery for a refund or exchange.
• For hygiene and safety reasons, opened or used products cannot be returned unless defective or faulty.
• A 20% restocking fee applies to all returns except defective. We will repair, replace, or refund defective items free of charge.
• For full details, please refer to our Return Policy under the Warranty tab.

Comparison Chart 

Product Model	KN4003BL	KN4003BL2D	KN4006B	KN4006BL1D	KN5000C
Setting	Home and domestic travel	Home, domestic and international travel	Home	Home, domestic and international travel	Clinics, hospitals and home
Name	Corded, Handheld 311nm UVB Lamp	Portable, Handheld 311nm UVB Lamp	Corded, Stationary & Handheld 311nm Double UVB Lamps	Portable, Handheld Double UVB Lamps	308nm Excimer Laser - Highest Intensity and Precision
Price	$288.44	$319	$365	$460	$2999.48
Application	- Psoriasis - Vitiligo - Eczema and other Atopic dermatitis  - Pityriasis Rosea and Tinea Capitis				– Patients with a longer history of more severe conditions, such as Psoriasis, Vitiligo, Eczema, Pityriasis Rosea, Atopic dermatitis and Tinea Capitis. – Patient who have not seen any improvement from other treatments.
Treatment Area	- Scalp and hairline - Face and neck - Hands, feet and relevantly smaller skin areas		- When the lamp is on the station: back, shoulders, and other hard-to-reach areas - When the lamp is removed from the station: arms, legs, torso, and other large skin areas	- Face and neck - Hands and feet - Torso, limbs and large skin areas	Entire body, including hard-to-target areas such as elbows, eyelid, armpits, fingers, knees and toes
Treatment Speed	Fast	Fast	1.2X Faster	1.2X Faster	11X Fastest
Lamp Intensity	4.5 mw/cm²	4.5 mw/cm²	5.5 mw/cm²	5.5 mw/cm²	50 mw/cm²
Light Source	1 x Philips 311nm ± 3nm Bulb	1 x Philips 311nm ± 3nm Bulb	2 x Philips 311nm ± 3nm Bulbs	2 x Philips 311nm ± 3nm Bulbs	308nm xeCl Excimer Laser 308nm ± 2nm
Treatment Size	8.5 in² ± 10%	8.5 in² ± 10%	16 in² ± 10%	16 in² ± 10%	3.1 in² ± 10%
Work Distance	1.18 in ± 0.20 in	1.18 in ± 0.20 in	1.18 in ± 0.20 in	1.18 in ± 0.20 in	1.18 in ± 0.20 in
Power source	Corded	Cordless, Built-in Rechargeable Battery, up to 70 minutes	Corded	Cordless, Built-in Rechargeable Battery, up to 40 minutes	Corded
Light Source Lifespan	≥ 500h	≥ 500h	≥ 500h	≥ 800h	≥ 500h
Package	UVB lamp, cord, UV-proof glasses, instruction	UVB lamp, charger, UV-proof glasses, instructions	UVB lamp and station, cord, UV-proof glasses and instruction	UVB lamp, distance holder, charger, UV-proof glasses and instructions	Excimer Laser 308nm, cord, 6 x shades, UV-proof glasses, 1 x aluminum case and instructions