Every LJUS device is built around one idea: specific wavelengths of light, delivered at a consistent distance and intensity, interact with living tissue in measurable ways. Below is the mechanism behind that: what the light actually does once it reaches the skin, and why we chose the wavelengths we did.
THE MECHANISM
Red and near-infrared light penetrate skin and tissue to stimulate cells directly. Red light works closest to the surface, on skin cells, tone and circulation. Near-infrared travels further, reaching muscle, connective tissue and joints. It is not heat, and it carries no UV.
Absorbed, not reflected
Light is taken up by light-sensitive components inside the cell, particularly within the mitochondria.
Two depths, one session
Combining red and near-infrared reaches surface and deeper tissue within the same treatment.
No UV, no burning
Therapeutic LEDs stimulate cells without the damage associated with UV or high-intensity lasers.
Wavelength ranges shown are those used across the LJUS range. Exact figures for each device are listed on its product page.
CELLULAR ENERGY
Mitochondria produce adenosine triphosphate, or ATP, the molecule that powers virtually all cellular activity. Red and near-infrared light are absorbed there, and that absorption supports ATP production. More available energy means cells have more to spend on repair, renewal and defence.
Faster tissue repair
Energy-rich cells can get on with growth and repair, which supports recovery after physical exertion.
Steadier cell turnover
Skin cells renew more readily, which over time reads as a fresher, more even complexion.
Resilience under load
With more ATP available, cells better maintain normal function when under physical stress.
Effects build with consistent use. Light supports the body's own processes rather than replacing them.
SKIN STRUCTURE
Red light reaching the upper dermis interacts with fibroblasts, the cells responsible for producing collagen and elastin. Collagen is the structural protein that keeps skin firm and elastic, and it is what thins as skin ages.
A denser fibre network
Supporting collagen and elastin production helps skin hold its structure.
Softer lines, better texture
Higher collagen density over time is what reduces the appearance of fine lines.
Visible clarity
As circulation improves alongside it, tone tends to even out and redness settles.
Results are gradual and vary between people. We don't promise a timeline.
INFLAMMATION
Inflammation is the body's normal response to stress or injury, but when it runs high or long it causes pain and slows healing. Red and near-infrared light influence cellular signalling in a way that supports a calmer inflammatory response.
Fewer pro-inflammatory signals
Which is what eases redness, swelling and discomfort in both skin and deeper tissue.
Drug-free, non-invasive
No compounds and no heat. The effect comes from the body's own regulatory processes.
Recovery gets out of its own way
With swelling reduced, the immune system can concentrate on repairing tissue.
Light therapy is not a treatment for a medical condition. If you have persistent pain, speak to a clinician.
CIRCULATION
Near-infrared light triggers the release of nitric oxide, which signals blood vessels to relax and widen. That vasodilation increases local blood flow, so tissue receives more oxygen and nutrients, and clears waste faster.
Vasodilation
Nitric oxide relaxes the vessel wall, widening it and raising flow through the treated area.
Faster clearance
Better circulation speeds removal of metabolic waste such as lactic acid after exercise.
Benefit across the whole area
In skin that means a better-nourished complexion; in muscle, more fuel for strength and endurance.
No heat is involved. Our devices stimulate circulation without warming the tissue.
In short: LJUS devices deliver precisely selected red and near-infrared light to activate cellular energy, support collagen production, ease inflammation and improve circulation. Each of those is a mechanism, not a promise, which is why every device page lists its exact wavelengths, LED count and output rather than a marketing figure.