Class IV Laser Therapy vs. Red Light Therapy | Evansville

Two tools, one family

Both fall under the umbrella of photobiomodulation: using red and near-infrared light to affect cells. What separates them is how much energy they deliver, how deep it reaches, and what the evidence and FDA clearance actually cover.

At a glance

	Red light therapy (LED panels, masks, wands)	Class IV laser at IPM
Light source	LEDs, usually red (about 630 to 660 nm) and near-infrared (about 810 to 850 nm)	Medical diode laser, near-infrared (810 and 980 nm)
Power	Low. Designed to be safe for home use	High. Class IV means more than 500 milliwatts, so it is used only by trained clinicians, with protective eyewear
Best-supported uses	Skin aging, pattern hair loss and some wound healing, depending on the device	Muscle and joint pain: neck pain, low back pain, tendon and arthritis pain
FDA status	Varies. Some devices are FDA-cleared for specific uses; many sold online are not	FDA-cleared for temporary relief of minor muscle and joint pain, stiffness, minor arthritis pain and muscle spasm, increased local circulation and muscle relaxation
Who applies it	You, at home or at a spa or gym	Your doctor, as part of a treatment plan based on your exam

What red light therapy is good for, and where the hype outruns the evidence

Red light therapy is real science, but the marketing has raced ahead of it. The best evidence for consumer red light devices is for skin rejuvenation and pattern hair loss, using specific FDA-cleared devices. Claims about fat loss, detox, hormones or curing disease are not supported. Recent dermatology reviews conclude that red light therapy is low-risk, but that consumer marketing often promises more than the research shows.

For deep muscle, joint and spine pain, the issue is dose. A low-power panel spreads a small amount of energy over a large area of skin, and much of it never reaches the tissue causing the pain.

What a Class IV laser does differently

A Class IV therapy laser concentrates far more energy into the treatment area, so it can deliver a meaningful dose to deeper muscles, tendons and joints in a few minutes. At IPM we use a LiteCure Class IV laser. LiteCure's LightForce therapy lasers are FDA-cleared for the temporary relief of minor muscle and joint pain, stiffness, minor arthritis pain and muscle spasm, and for temporarily increasing local blood circulation and relaxing muscle.

A note on wording: medical devices like these are FDA-cleared, not "FDA-approved." Clearance means the FDA reviewed the device and found it substantially equivalent to devices already on the market for the same uses. Be wary of any light device advertised as "FDA-approved."

What the research shows for pain

Neck pain: a 2009 review in The Lancet of 16 randomized trials found laser therapy reduced pain right after treatment for acute neck pain, and for up to 22 weeks after treatment for chronic neck pain, with side effects similar to placebo.
Low back pain: the American College of Physicians' 2017 guideline lists low-level laser therapy among the non-drug treatments to try first for chronic low back pain, alongside exercise, acupuncture and spinal manipulation. The supporting evidence was rated low quality.
High-intensity (Class IV) laser: reviews of randomized trials in 2018 and 2023 found high-intensity laser therapy reduced pain and improved function in musculoskeletal conditions, with the largest benefits for neck and back pain. The authors caution that many studies had a high risk of bias.

Our take: laser therapy is a useful tool, not a stand-alone cure. It works best as part of a plan that includes hands-on care and exercise, and research comparing approaches points the same way.

What a laser session at IPM is like

You wear protective glasses while the doctor moves the laser's handpiece over the painful area. Most people feel gentle, soothing warmth. A treatment typically takes a few minutes per area, and there's no downtime, so you can go straight back to work. We re-check how you're responding after the first few visits and adjust the plan.

We don't use the laser over the eyes, over a known cancer, or over the abdomen during pregnancy, and we review your medications for any that increase light sensitivity.

Should you buy a home red light panel?

If your goal is skin or hair, an FDA-cleared device for that specific use may be reasonable. If your goal is relief from neck, back, joint or nerve pain, start with an exam. Knowing what's causing your pain matters more than any device, and we'll tell you honestly whether laser therapy is likely to help.

Questions

Is red light therapy the same as laser therapy?

They're related but not the same. Both use red and near-infrared light, but a Class IV medical laser delivers much more energy to deeper tissue, is FDA-cleared for muscle and joint pain relief, and is applied by a trained clinician.

Is your laser FDA-approved?

Medical lasers like ours are FDA-cleared, which is the correct term for these devices. Our LiteCure laser is cleared for temporary relief of minor muscle and joint pain, stiffness, minor arthritis pain and muscle spasm, among other uses.

Does Class IV laser therapy hurt?

No. Most patients feel a gentle, soothing warmth. If anything feels too warm, the doctor adjusts the settings.

Does insurance cover laser therapy?

Many plans, including Medicare, don't pay for laser therapy. We'll tell you the cost before your first treatment, so there are no surprises.

Sources: FDA 510(k) clearance K173067 (LiteCure LightForce therapy lasers); Chow et al., The Lancet, 2009; Qaseem et al., American College of Physicians guideline, Annals of Internal Medicine, 2017; Song et al., Medicine, 2018; Arroyo-Fernández et al., Journal of Clinical Medicine, 2023. Reviewed by Dr. Eric L. Mitz, DC, LAc, licensed in Indiana since 1996.

Class IV laser therapy vs. red light therapy: what's the difference?