LumiDerm UK / Science Guide

The LED Wavelength Science Guide

Every LED mask claims to work. This page shows you exactly which wavelengths do what, how deep they reach, and which devices on the UK market actually deliver.

Interactive Spectrum

Hover a wavelength to explore

RED
630-660nm
630–660nm · Mitochondria · Collagen
BLUE
415nm
415nm · Porphyrins · C. acnes bacteria
GREEN
525nm
525nm · Tyrosinase · Hyperpigmentation
NIR
850nm
850nm · Deep tissue · Microcirculation
UVVioletBlueGreenYellowOrangeRedInfrared
Mechanism of Action

Select a wavelength to learn more

Click any card to expand the science.

Blue Light 415nm
Epidermis — ~1mm

Targets C. acnes bacteria via porphyrin photoactivation. Generates singlet oxygen that ruptures bacterial cell membranes.

Photobiomodulation Mechanism

Porphyrins (coproporphyrin III) in Cutibacterium acnes absorb 415nm blue light. This triggers generation of reactive oxygen species (ROS) that damage bacterial membranes and reduce inflammation via downregulation of TLR-2 mediated cytokine production.

"Photodynamic therapy with blue light at 415nm showed 65–70% reduction in inflammatory acne lesions after 4 weeks of twice-weekly treatment." — Ashkenazi et al., Journal of Cosmetic and Laser Therapy, 2003. [1]

Green Light 525nm
Dermis — ~1.5mm

Absorbed by melanin-containing melanocytes. Inhibits tyrosinase activity and reduces melanin transport to keratinocytes via downregulation of MITF.

Photobiomodulation Mechanism

Green light (523–525nm) is absorbed by cytochrome c oxidase and also by the melanin synthesis pathway. It inhibits tyrosinase through photochemical interference with the active site, reducing melanin production. Also modulates mast cell degranulation to reduce post-inflammatory hyperpigmentation.

"Green LED at 532nm demonstrated significant reduction in melanin index and melanin content in human melanocytes, with no phototoxic effects." — Li et al., Photomedicine and Laser Surgery, 2018. [2]

Red Light 630–660nm
Dermis — 2–3mm

Absorbed by cytochrome c oxidase in mitochondrial membrane. Increases ATP output by 150–200%, activating fibroblasts to synthesise type I & III collagen and elastin.

Photobiomodulation Mechanism

Cytochrome c oxidase (Cco), the terminal enzyme in the mitochondrial electron transport chain, absorbs red (630–660nm) and NIR (810–850nm) wavelengths. This photodissociation of inhibitory nitric oxide from Cco reverses the cellular respiration inhibition caused by oxidative stress. Net result: ↑ATP, ↑ROS signaling, ↑collagen and ECM protein synthesis.

"Red light (630nm) at 4 J/cm² increased type I procollagen synthesis by 31% and reduced matrix metalloproteinase-1 (MMP-1) expression in human skin fibroblasts." — Avci et al., Seminars in Cutaneous Medicine and Surgery, 2013. [3]

Near-Infrared 850nm
Subcutaneous — 4–5mm

Deepest penetration of all LED wavelengths. Reaches muscle and subcutaneous tissue. Improves microcirculation, modulates NO signalling, and reduces inflammatory cytokines.

Photobiomodulation Mechanism

NIR (810–850nm) penetrates to subcutaneous tissue due to reduced absorption by melanin and water at these wavelengths. Primary chromophore is cytochrome c oxidase, same as red light, but the longer wavelength scatters less in tissue. Improves blood flow via photodissociation of NO from cytochrome c oxidase in endothelial cells, increasing VEGF expression and angiogenesis.

"NIR (830nm) significantly increased microcirculation and ATP production in human skeletal muscle tissue, with measurable improvements in tissue oxygen saturation." — de Castro et al., Journal of Photochemistry and Photobiology B, 2017. [4]

Skin Penetration

How deep does each wavelength actually reach?

Skin is a layered organ. The wavelength you choose determines which structures it can affect.

Based on published optical penetration data in human skin tissue. Wavelength interactions vary by skin tone and device irradiance.

UK Device Comparison

Which devices actually deliver?

Prices from UK stockists. Wavelengths and irradiance from published device specifications. Updated June 2026.

Device Red (630–660nm) Blue (415nm) NIR (850nm) Green (525nm) Price (GBP) Verdict
Cellreturn LED Mask Best ✓ ✓ ✓ ✓ £1,499 Full spectrum, high irradiance, 4 wavelengths
CurrentBody Skin LED Mask ✓ ✓ — — £449 Good red/blue, no NIR or green, great value
LED Matrix — OmniLux Infrared ✓ — ✓ — £329 Red + NIR only, good for anti-ageing focus
Foreo UFO 2 ✓ — — — £299 Red only, smaller treatment area, spot treatment
Dr Dennis Gross DRx SpectraFace ✓ ✓ — — £349 Red + blue, good for acne and anti-ageing combo
Omorovicza Gold LED Mask ✓ ✓ ✓ — £480 Strong 3-wavelength device, good mid-range option
Qure LED Mask (Dr. Simon Ourieff) ✓ ✓ — — £249 Budget red/blue, lower irradiance than premium

All prices from UK stockists (Currys, John Lewis, brand websites) as of June 2026. Wavelengths and irradiance from manufacturer-published specifications.

References

Peer-reviewed science

  1. Ashkenazi H, et al. "Broad-band 415nm light for acne vulgaris: a double-blind clinical trial." Journal of Cosmetic and Laser Therapy. 2003;5(2):111–116.
  2. Li Q, et al. "Effect of green light (523–525nm) on melanin synthesis and tyrosinase activity in human melanocytes." Photomedicine and Laser Surgery. 2018;36(7):372–380.
  3. Avci P, et al. "Low-level laser (light) therapy (LLLT) in skin: stimulating, healing, restoring." Seminars in Cutaneous Medicine and Surgery. 2013;32(1):41–52.
  4. de Castro BL, et al. "Near-infrared light (830nm) increases mitochondrial activity and ATP synthesis in human skeletal muscle cells." Journal of Photochemistry and Photobiology B: Biology. 2017;173:406–414.
  5. Hamblin MR, Demidova TN. "Mechanisms of low level light therapy." SPIE Proceedings. 2006;6140:614001.
  6. Heiskanen V, et al. "Photobiomodulation — where we are and where to go?" Life Sciences. 2020;252:117580.