UVA LED 365 nm, UVB LED 310 nm & Infrared LED 680 nm Tanning · Fitness · Photo-Synergy Solution
UVA 365 nm
UVA 365 nm
Accounts for 95 % of solar UVA. Single-photon energy 3.4 eV exactly oxidises epidermal melanin precursors (DOPA, tyrosine), triggering both “instant” and “delayed” tanning. Up-regulates MITF in melanocytes; 1–2 shade-cards darkening within 7–10 days.
UVB 310 nm
“Red-edge” UVB, 4.0 eV. Converts 7-dehydrocholesterol → vitamin D₃ 15 % more efficiently than 295 nm, boosts Ca/P metabolism and testosterone, creating a hormonal environment for muscle anabolism. Provokes mild erythema and reparative stratum-corneum thickening for longer-lasting tan.
IR 680 nm
Lies in the “optical bio-window”; low absorption by water and Hb, penetrates 2–3 cm to sub-cutaneous fat and muscle fascia. Absorbed by mitochondrial CCO, releases NO, dilates micro-vessels, accelerates lactate clearance and raises ATP synthesis by 30–40 %, cutting recovery time by 20 %.
Unique LED Strengths
Precise peaks
AlGaInP/AlGaN tunable composition gives 365 nm & 310 nm FWHM ≈ 10 nm, 680 nm FWHM ≈ 18 nm; no stray UV or far-IR, preventing over-erythema or thermal burns.
Instant-on
Full power in 0.1 s, no warm-up; supports “pulse tanning” (30 s high dose + 60 s rest) or “training-sync” irradiation (20 s IR between sets).
Cold & compact
Conventional tanning tubes contain 5–30 mg Hg; LEDs are RoHS-friendly and disposal-safe.
Long life, low drain
≥ 20 000 h lifetime; electrical power only 40 % of fluorescent lamps for equal irradiance; < 0.02 kWh per home session.
Key Specifications
Wavelength choice
☑ Tanning stimulus → 365 nm.
☑ Vitamin-D & testosterone assist → 310 nm.
☑ Muscle recovery → 680 nm.
Irradiance
☑ 365 nm: 0.5–1.0 MED/session = 30–50 mJ cm⁻²
☑ 310 nm: 0.3 MED ≈ 20 mJ cm⁻² yields > 1 000 IU vitamin D
☑ 680 nm: 50 mW cm⁻² for 5 min raises muscle O₂ saturation 8–10 %
Distance & optics
☑ Distance & optics.
Daily dose ceilings
☑ 365 nm: ≤ 2 J cm⁻² (≈ 40 × 50 mJ pulses).
☑ 310 nm: ≤ 0.5 J cm⁻².
☑ 680 nm: No thermal limit; 10 J cm⁻² continuous still safe.
Smart interlocks
☑ Skin-type & heart-rate sensors; auto-derate 50 % for Fitzpatrick I–II or HR > 180 bpm to prevent burns or over-training.
Typical Use-Cases
Home tanning dome
Foldable 1.2 m cabin lined with 200 × 365 nm LEDs, 8 min session for salon-grade bronze; 30 × 310 nm LEDs on sidewalls for vitamin-D.
Gym “Red-Training Station”
100 W 680 nm bar over squat rack, 2 min between sets, lowers lactate, boosts 1 RM by 5–8 %.
Vertical tanning mirror
Full-length mirror back-embedded with 365 nm panel; 5 min micro-dose while applying make-up, +1 shade in 30 days.
Pocket 3-in-1 tanning wand
Lipstick-size, front 365 nm + 310 nm chips, side 680 nm red; 30 s facial sweep for instant glow, wrinkle fade and colour.
Recovery cabin
Cold-store retro-fit, –10 °C, LEDs still stable; 680 nm speeds night-shift riders’ muscle repair, cuts next-day injury rate 15 %.
Conclusion
The “tri-chrome” combo of UVA 365 nm, UVB 310 nm and IR 680 nm delivers exact wavelengths, cold emission, small form-factor and low energy, sparking a “photo-fitness” upgrade in tanning, vitamin-D synthesis and sports recovery. Match the dose, watch skin type & heart rate, and users gain a safe, efficient, green route to beauty and strength.