Philips BU-1S UVB Lamp – Medical device for vitiligo, psoriasis and eczema
Manage skin conditions effectively and conveniently at home. The Philips BU‑1S medical device emits a precise 311 nm NB‑UVB wavelength that supports the treatment of:
- Vitiligo
- Psoriasis
- Atopic eczema
- Seborrhoeic dermatitis
- Other eczema, including hand eczema

Technical Specifications
Model: Philips BU-1S, Powered by Philips PL-S 9W/01 (Original Medical Bulb).
Dimensions: 300 × 55 × 45 mm
Weight: 0.48 kg
Emission peak: 311 nm (narrowband UVB)
Irradiance: ≥ 7 mW/cm²
Manufacturer: YouWeMed

Preparing for Your First Session
- Plug in the mains lead and switch the unit on.
- Initial exposure time:
- Adults: 30 seconds
- Children: 15 seconds
Directions for Use
- Treat 2–3 times per week, leaving at least one full day between sessions.
- Only treat when any redness (erythema) from the previous session has subsided and the skin has fully recovered.
A skin reaction (erythema - redness) typically appears 6–8 hours after exposure:
- No redness: increase exposure time by 20 seconds at the next session.
- Mild redness: if it clears within 24 hours, extend by 20 seconds at the next session.
- Noticeable redness (desired state): if it is still pink after 24 hours, keep the same time and wait for it to fully fade.
- Marked redness: pause treatment until the skin returns to normal, then reduce the time by 20%.
- The typical exposure per spot is about 3–4 minutes, depending on skin type.
The Philips BU‑1S handheld NB‑UVB lamp is designed to be user-friendly, versatile and highly effective for managing vitiligo, psoriasis and other inflammatory skin conditions. With regular, well‑titrated use, you can support healthier, more even skin.




Frequently Asked Questions – Philips BU‑1S for psoriasis
Frequently Asked Questions – Philips BU‑1S for vitiligo
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Richard,
2.4.2025 10:29.54
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I've been using the Philips UVB lamp for my psoriasis treatment over the past few weeks. It has noticeably reduced my symptoms, and I'll certainly continue with the treatment.
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