What is LED Light Therapy and How Does It Work?

Looking for a skin treatment that’s gentle, effective, and doesn’t involve needles or downtime? Our LED light therapy might be your new favorite go-to treatment at Sparkle!

"LED" stands for Light Emitting Diode, which is a semiconductor that emits light when an electric current passes through it. This light is absorbed, sending energy into deep levels of the skin to kickstart natural healing processes like collagen production and cell repair. The therapy involves the application of specific wavelengths of light typically ranging from red to blue. Each color of light is believed to have different effects on the skin making LED therapy versatile for a range of concerns.

How Does LED Light Therapy Work?

It’s all about that light energy. The core principle behind LED light therapy is that light energy is absorbed by the skin at various depths, which triggers a biochemical reaction. Once absorbed, they stimulate your cells (specifically the mitochondria — the cell’s powerhouse) to produce more energy. This boost in cellular energy speeds up healing, reduces inflammation, and promotes smoother, healthier-looking skin.

For example, red light (around 630–650 nm) reaches deeper into the skin where it helps stimulate collagen, smooth wrinkles, reduce inflammation, and improve firmness and elasticity. In contrast, blue light (around 415 nm) works closer to the surface making it ideal for treating acne by targeting and destroying acne-causing bacteria.

Low-level LED light therapy is a highly safe and non-invasive treatment making it suitable for all skin types and ages. Unlike other light-based treatments, it doesn't use UV rays, so there's no risk of burning or skin damage. The light emitted by the LEDs penetrates the skin gently, promoting healing and rejuvenation without any discomfort or downtime. 

Celluma is our preferred LED Light Therapy at Sparkle Aesthetics.

What Does LED Light Therapy Treat?

LED light therapy is a multitasker – it targets a wide range of skin concerns. Here’s how different wavelengths work their magic:

1. Acne: Blue LED light helps clear breakouts by killing acne-causing bacteria (P. acnes) and calming inflammation.

2. Wrinkles and Fine Lines: Red LED light stimulates the production of collagen and elastin in the skin, leading to firmer, smoother skin and a reduction in fine lines and wrinkles. This is a great add-on to aesthetic services such as a facial if you are interested in anti-aging treatments.

3. Hyperpigmentation: By encouraging cell turnover and slowing melanin production, light therapy can help fade sun damage, age spots, and uneven skin tone.

4. Wound Healing & Scars: LED light speeds up the skin’s natural repair process by improving circulation and encouraging collagen formation — ideal for healing cuts, burns, and scars. Studies show that red LED helps to decrease inflammation too!

5. Psoriasis and Eczema: Light therapy, particularly red and near-infrared wavelengths, can reduce inflammation and promote healing in conditions like psoriasis and eczema.

6. Rosacea: LED light, especially red and amber wavelengths, can help calm irritated skin, reduce redness, calm inflammation, and improve skin texture in those with rosacea.

7. Hair Loss: Some studies suggest that near-infrared LED light can stimulate hair follicles by promoting hair growth.

8. Dehydrated Skin: The wavelengths have a direct positive influence on the fibroblasts. This stimulation will increase the demand for natural hyaluronic acid. This increase in natural HA will increase hydration as the HA attracts 20 times its body weight in water resulting in more hydration.

   
   

Is LED Light Therapy Safe?

Yes! LED light therapy is considered to be a very safe treatment when used correctly. Because this treatment is non-invasive and free of UV rays, it’s much gentler on the skin compared to traditional light or laser treatments. There's no downtime, no needles, and no after-care requirements. LED Light Therapy is quick, easy, and painless! It is suitable for all skin types and ages.

Potential side effects are rare, but some people may experience mild redness, swelling, or tingling after the treatment. These effects typically subside within a few hours. Since the treatment doesn’t involve harsh chemicals or heat, the risk of irritation or serious side effects is very minimal. That said, if you’re pregnant, light-sensitive, or have a history of seizures, it’s best to check with your doctor before starting LED light therapy.

LED Light Therapy can be added on to many treatments!

How Long Does the Effect Last?

Everybody is different, so results and treatment duration vary from person to person. Some people like to do LED Light Therapy once per month, others prefer to do it three times per week. Most users report results after just one treatment.

Conclusion

LED light therapy is a powerful, non-invasive solution for a wide range of skin concerns — from breakouts and signs of aging to wound healing and inflammation. Its ability to boost cellular regeneration makes it a go-to treatment in both skincare clinics and medical settings. As with any skincare treatment, it’s essential to follow the proper protocols and consult with one of our providers if you have any concerns. Whether you're using a professional device at a spa or a handheld tool at home, following proper guidelines is key to getting the best results. And if you have any health concerns, it’s always smart to check in with one of our providers to make sure you're a proper candidate.

Safe, effective, and backed by science — LED light therapy is a glowing addition to any skincare routine.