Klär Lite™ (RCW-KL1000) is a handheld narrowband UVB LED Class II medical device developed by Radcliffe Watts. The U.S. Food and Drug Administration issued 510(k) clearance K253871 on March 4, 2026. The cleared indications describe prescription use for localized phototherapeutic treatment of dermatologic conditions such as psoriasis, vitiligo, atopic dermatitis (eczema), seborrheic dermatitis, and leukoderma on skin types I-VI.Sources: U.S. Food and Drug Administration 510(k) K253871

The Klär Lite™ is an Ultraviolet Light Emitting Medical Device.It is intended for use in localized phototherapeutic treatment of dermatologic conditions on all skin types (I-VI) such as:atopic dermatitis (eczema)leukodermapsoriasisseborrheic dermatitisvitiligoSources: U.S. Food and Drug Administration 510(k) K253871

Narrowband UVB (NB-UVB) is a medical light treatment. It uses a set range of ultraviolet B light to help slow the extra skin growth and swelling caused by psoriasis. Most people need many short treatments, not just one.Your care team tells you how much light to use and how often. The right dose depends on your skin, your condition, and the device. Timing, eye protection, covering skin that should not be treated, and checking your medicines are all important. Never copy someone else's treatment schedule.Sources: American Academy of Dermatology. Psoriasis treatment: PhototherapyNational Psoriasis Foundation. Phototherapy for Psoriasis

Klär Lite™ uses narrowband UVB LED light for phototherapy. The device is designed to deliver treatment in a targeted way for localized areas.

No. Medical UVB treatment uses prescription equipment and a set treatment plan. Tanning beds often use mostly UVA light. They are not a safe replacement for medical narrowband UVB treatment. The National Psoriasis Foundation warns against using tanning beds instead of medical phototherapy.Tanning beds can harm skin and raise the risk of skin cancer. Ask your doctor about medical treatment instead.Sources: National Psoriasis Foundation. Phototherapy for Psoriasis

Yes. The Klär Lite™ is a prescription medical device and should be used under the direction of a dermatology provider.Klär Lite™ is NOT available over the counter (OTC) or without a prescription.Sources: U.S. Food and Drug Administration 510(k) K253871National Psoriasis Foundation. Phototherapy for Psoriasis

Yes. Narrowband UVB may be an option for people with many skin tones. The LITE study included Fitzpatrick skin types I through VI, a scale doctors use to group how skin reacts to UV light. Home treatment met the study's main goals across the skin types studied.Redness can be harder to see on darker skin. Changes in skin color may also stand out more. Your care team should check your skin in a way that fits you. Klär Lite is FDA-cleared for localized light treatment on skin types I-VI. This does not mean results are the same for every skin type.Sources:Medical Study: Home vs. Office UVB Treatment (JAMA, 2024)U.S. Food and Drug Administration 510(k) K253871

Yes, the Klär Lite™ is FDA-cleared and has an FDA 510(k) number listed as K253871.Sources: U.S. Food and Drug Administration 510(k) K253871