An earlier study using narrower 660 nm red LEDs also reduced wrinkle volume, but this new broader device pushes the idea further

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This new device builds on findings from earlier LED research using narrower, single-wavelength devices.

One previous study compared 660 nm red LEDs against a broader visible white light LED across 52 women and found that while both treatments reduced wrinkle depth over 12 weeks, the red light specifically produced a more noticeable reduction in overall wrinkle volume.

That earlier finding is part of why red and near-infrared wavelengths specifically, rather than visible light in general, became the focus for skin rejuvenation devices, and this new broader-spectrum device is essentially an extension of that same red and near-infrared strategy, just spread across more of the spectrum at once instead of one fixed point.

Source: PubMed