Why Do Some Lights on a Red Light Panel Look Like They’re Not Working?
If you’ve ever used a red light therapy panel, you might have noticed something strange:
👉 Some lights glow bright red, while others look completely dark.
Don’t worry—this doesn’t mean the device is broken! Those “dark” LEDs are actually emitting near-infrared light (NIR), which is invisible to the human eye.
Red Light vs. Near-Infrared Light
1.Red Light (around 600-700nm)
Visible to the eye, which is why you see the red glow.
Penetrates about 5–10 mm into the skin.
Works mainly on the surface: improving skin tone, boosting collagen, and enhancing overall complexion.
2.Near-Infrared Light (around 800–850nm)
Invisible—so it looks like the LEDs are off.
Penetrates much deeper, up to 3–5 cm into tissues.
Supports muscle recovery, reduces inflammation, and promotes healing beneath the surface.
In other words, the “dark” LEDs are actually hard at work, targeting deeper layers that red light alone can’t reach.
Why Combine Both Types of Light?！！！
Red light and near-infrared light are a powerful duo:
Red Light → Skin-level benefits: beauty, complexion, anti-aging.
Near-Infrared Light → Deep tissue benefits: recovery, relaxation, joint and muscle support.
Together, they create a comprehensive therapy effect—both inside and out.
✅ The Takeaway
So next time you notice that some lights on your panel don’t seem to shine, remember:
The glowing ones → Red light (visible)
The “dark” ones → Near-infrared light (invisible but powerful)
They’re both working hand in hand to boost your health, recovery, and well-being.
