The Light Box That Heals

Daavlin 3 Series PC311-48 — Jade Ann Byrne Medical Dossier

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The Room, Styled Like a Vogue Tech Credit

• Cabinet: Daavlin 3 Series full-body phototherapy booth with arched doors, wire safety grille, octagonal foot platform, and overhead cooling fans.

• Control: “3 Series Smart Touch” PC/monitor for dosing and patient logs.

• Power & safety: Square D service disconnect on the wall

• Vibe: clean, matte-grey hardware against white walls—the medical equivalent of a studio cyclorama.

Device ID

Model: 3 SERIES PC311-48 (Smart Touch PC controlled)

• Lamps: 48 total
• Electrical: 208 – 240 V, ~30 Amps, 60 Hz
• Listing: ETL listed to medical electrical safety standards
• Mfr/date: Daavlin, Bryan, Ohio — May 2010
• What “311-48” means: 311 nm narrowband-UVB configuration, 48 lamps.

The Bulbs (confirmed by the lamp etch)

• Make/model: PHILIPS TL 100W/01-FS72
• Type: NB-UVB ( Narrow Band Ultraviolet-B)
• Spectral peak: ~311 nm
• Form factor: FS72/T12, 100 W each
• Count: 48 in this cabinet. 4800 WATTS of The Light

What It Emits (The Light)

Narrowband UV-B centered around 305 – 315 Peaking at 311 nm—the dermatology plantnium standard for whole-body treatment of photo-responsive diseases. The spectrum maximizes therapeutic effect while minimizing unnecessary erythema.

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My Protocol of The Light

• Frequency: Every other day for ~3 months
• Shielding: UV goggles; cover tattoos and sensitive sites as directed.
• Before: no perfumes/retinoids on exposed skin; disclose any new photosensitizing meds.
• After: bland moisturizer, note pinkness/itch/dryness at 24 h, SPF if skin sees sun.

Today’s Dose (the math you can see)

Dose is mJ/cm² = irradiance (mW/cm²) × time (s).

Cabinet irradiance varies by calibration; clinics typically see ~4–10 mW/cm² at patient position.

Today was 28 seconds:

• 4 mW/cm² → 112 mJ/cm²
• 5 mW/cm² → 140 mJ/cm²
• 6 mW/cm² → 168 mJ/cm²
• 8 mW/cm² → 224 mJ/cm²
• 10 mW/cm² → 280 mJ/cm²

Fitzpatrick II assumption: many NB-UVB protocols start around ~200–300 mJ/cm² with 10–20% step-ups as tolerated.

So if this booth’s current output is ~8–10 mW/cm², 28 s sits right in the typical start window; if output is lower (5–6 mW/cm²), it’s a conservative early session.

(The clinic’s Output Certificate or Smart Touch screen will show the exact mW/cm² so we can pin the precise mJ/cm² in my log.)

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Bottom line: This is my studio-clean light ritual—48 TL-01 suns arranged in a curve, timed by millisecond, logged by dose, repeated every other day until the skin forgets it ever needed saving.