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Kernel

Corded, Handheld 311nm UVB Lamp - Light Therapy for Psoriasis or Vitiligo on Scalp, Face, Neck, Hands and Feet

(19 reviews) Write a Review
$288.44
SKU:
KN4003BL_EA
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Description

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Comparison Chart

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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.
  • 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 Return Policy under the Warranty tab.

Warranty Information

UVB Lamps – Warranty & Return

Product Warranty

  • 1-year warranty on the device
  • 500-hour warranty on the UV light source
  • Includes free parts, replacements, and shipping for manufacturer defects
  • Post-warranty repairs may be arranged through Hey Med Supply

This warranty complies with the Magnuson–Moss Warranty Act, which requires that all terms be clearly disclosed.

14-Day Return Policy

  • Returns accepted within 14 days of delivery for a refund or exchange.
  • Opened or used products cannot be returned unless defective.
  • A 20% restocking fee applies to all returns except defective.
  • We will repair, replace, or refund defective items free of charge.

Eligible Returns

  • Sealed & Unused: The device, original packaging, and all accessories (including user manual and UV-protective glasses) must be in new, unused, and undamaged condition.
  • Defective or Damaged: Products that arrive defective or damaged may be returned, even if opened, as long as the issue is reported within 14 days.

Ineligible Returns

We are unable to accept returns if:

  • The return is not authorized in advance
  • The request is made after 14 days of delivery
  • The return is shipped back more than 5 days after receiving authorization
  • The product is no longer in “new” condition, including:
    • Devices that are damaged
    • Missing or damaged original packaging
    • Missing or damaged accessories
    • Retail packaging with shipping labels or markings applied directly

How to Return

  1. Initiate a Return
    • Contact our team via email or through our website within 14 days of delivery.
    • Complete the return form. Reply to your order confirmation email with the form attached, along with any additional details you'd like to share.
  2. Receive Authorization
    • We will respond within 24 hours with approval and return instructions.
    • Unauthorized returns will not be accepted.
  3. Ship Back the Product
    • Repack the item with all original components and undamaged, original packaging.
    • Place the product box inside a separate shipping box for protection during transit.
    • Do not apply labels directly to the product packaging.
    • Ship the return within 5 business days of receiving authorization.
    • Customers are responsible for return shipping unless the item is defective or damaged.
  4. Receive Refund
    • Refunds are processed within 48 hours of return inspection.
    • We reserve the right to refuse returns showing signs of misuse or wear.
    • Please allow 2–3 business days for the refund to appear in your account.
    • Returns that do not meet our policy criteria may be declined.

Regulatory Compliance

Hey Med Supply complies with all relevant U.S. consumer protection and FDA regulations, including:

  • Magnuson–Moss Warranty Act (clear warranty terms and dispute resolution)
  • FDA Quality System Regulation (21 CFR Part 820) (device servicing and safety)
  • 21 CFR Part 806 (reporting of medical device corrections or recalls)
  • Applicable state laws requiring conspicuous return policy disclosures

Product Details

Delivery:
Free shipping 2 - 3 Days
Application:
Psoriasis, Vitiligo, Eczema, Pityriasis Rosea, Atopic Dermatitis
Treatment Area:
Scalp, Face, Hands and Feet
Brand Name:
Kernel
Product:
Corded, Handheld 311nm Narrowband UVB Lamp
Model:
KN4003BL
Certificate:
FDA Approved
Wavelength:
311 nm ± 3 nm
Light Source:
1 x Philips Light Bulb
Light Intensity:
4.5 mw/cm2
Treatment Size:
8.5 in² ± 10%
Treatment Speed:
Fast
Treatment Mode:
Time
Work Distance:
1.18 in ± 0.20 in
Built-in MED Test:
N
Mobility:
Corded
Built-in Battery:
N
Power Source:
110V (60Hz)
Screen:
Basic LED Screen
Light Source Lifespan:
≤ 500h
Packing List:
1 x KN4003BL, 1 x UV-proof Goggles, 1 x Charging Cable, 1 x User Manual
Dimension:
12.48'' L × 2.05'' W × 1.89'' H
Product Weight:
1.63 lbs

Reviews

19 Reviews

  • 5
    Great Customer Service

    Posted by Karly G. on July 17, 2025

    Their communication has always been prompt and helpful regarding my questions about the product, instructions, and shipping. Their clear and timely responses definitely eased my nerves about using the device. I'm feeling confident and ready to give phototherapy a try.

  • 5
    It arrived in two days!

    Posted by Darejan V. on July 14, 2025

    The delivery is fast and well-packed. I use it to treat eczema between my fingers, on my knuckles, and palms. I try to avoid steroid creams as much as possible, so UVB therapy has been a great alternative.

  • 5
    Recommend

    Posted by J Kaye on July 1, 2025

    It’s worth the price I paid. I’ve been using it for plaque psoriasis since April, and some of the raised, red, inflamed skin around my hairline has cleared up. The dead scales on those patches first darkened and hardened, then gradually fell off as new skin formed after two-month of treatment. The process is slow, but it’s working. You need to be consistent and patient.

  • 5
    It definitely works!

    Posted by Emma S W on May 13, 2025

    I got this to treat the eczema on my elbows, which was itchy and sometimes painful, especially during the summer. Since purchasing it in April, I’ve been using it consistently, and I can confidently say that there’s been significantly less rash compared to the same time last year.

  • 5
    Would recommend

    Posted by Ray D. on May 8, 2025

    I started using this device after my dermatologist recommended narrowband UVB therapy for my vitiligo. I’ve been treating my hands and face 3 times a week, and after 3 months, there’s already noticeable repigmentation.

  • 5
    Good enough

    Posted by Customer on May 5, 2025

    The delivery was quick. Let's try it out!

  • 5
    Affordable option

    Posted by Anonymous user on April 30, 2025

    The eczema on my fingers, elbows, and the hollows behind my knees has been getting itchier as the weather gets hotter. I’m applying lotion regularly, and I’m hopeful that this lamp will bring some relief. I plan to stick with the treatment three times a week throughout the summer to see what kind of difference it makes.

  • 5
    The delivery only takes 2 days!

    Posted by Garrett on April 24, 2025

    The package arrived in great condition, and I was pleasantly surprised to find a quality examination card included, showing that the device was tested before shipping.

  • 4
    Will try this first.

    Posted by Jay on April 17, 2025

    I decided to start with this entry-level device before investing in a more high-end model. It’s a great.