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Ex vivo (human blood) · 2018 · China (Tianjin)

Effect of 405 nm low intensity irradiation on the absorption spectrum of in-vitro hyperlipidemia blood

Wang · Technol Health Care · 2018

The protocol this study used

Wavelength
405 nm
Dose
12 J/cm²
Sessions
6
Per session
—

What the authors concluded

Results show that after 405 nm low-intensity laser irradiation, whole blood samples of high lipid level statistically have higher absorbance peak value than normal samples while erythrocyte samples have lower absorbance peak value.

Devices that emit this wavelength

Matched on wavelength within 15nm, since LED bins vary by roughly that much and a tighter match would be false precision. Where we have an irradiance figure, the session length is the time needed to reach this study's dose of 12 J/cm² at that intensity.

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Omnilux Clear
415 · 633 nm
Brand claim
$395
≈ 4 min 33 sec / session
at 44 mW/cm²
Shark Beauty CryoGlow LED Face Mask
415 · 630 · 830 nm
Not published
$349.99
no irradiance published
Therabody TheraFace Mask
415 · 633 · 830 nm
Not published
$649.99
no irradiance published
Qure Q-Rejuvalight Pro
415 · 605 · 630 · 660 · 880 nm
Not published
$399
no irradiance published
Hooga HG24 4-in-1
415 · 590 · 660 · 850 nm
Not published
$39.99
no irradiance published
Hooga Red Light Therapy Facial Wand
415 · 460 · 630 nm
Not published
$70
no irradiance published

Matching a wavelength is not the same as reproducing a trial. Session times assume the device's published irradiance is accurate at the distance it was measured, which on brand-claim figures is often optimistic. Where a device publishes both a peak and an average we use the average, and where it publishes a falloff curve we use the lowest figure, so these times run long rather than short. Clinical protocols also control for spot size, contact and skin type in ways a home device cannot.

Source

Dosimetry extracted by Vladimir Heiskanen in Photobiomodulation (PBM) research - a comprehensive database. Citation resolved against PubMed.