What are the main specifications to compare therapy lasers?

The three main specifications are: Power (measured in milliwatts for Class 1-3b, watts for Class 4), Wavelength (measured in nanometers, with 600-660nm for shallow treatment, 800-860nm for deep penetration, 900-980nm for pain control), and Pulsing (continuous wave vs pulsed operation).

What is the difference between Class 3B and Class 4 lasers?

Class 3B lasers have less than 500mW continuous output per diode and are safe for practitioners and home use with basic precautions. Class 4 lasers have 500mW or more per diode, provide faster treatment times, but require training to avoid potential eye or tissue damage.

What wavelength is best for cold laser therapy?

It depends on the application. 600-660nm (red) is best for shallow treatments and lymphatic issues. 800-860nm is the sweet spot for deep penetration and mitochondrial interaction. 900-980nm is preferred for pain control and super-pulsing applications. The best lasers offer multiple wavelengths.

What is a Class 1M laser?

Class 1M lasers use super-pulsing technology to deliver up to 500mW (same as Class 3B) while being safe enough that they cannot cause eye damage unless focused through a lens. This makes them about 100 times stronger than Class 1 or 2 lasers while maintaining the highest safety rating for home use.

The 2026 Therapy Laser Guide

Q: Is cold laser therapy FDA approved?

Cold lasers are FDA registered (not approved, as the FDA uses different terminology for devices) for pain reduction, inflammation reduction, and increasing blood flow. Over 4,000 clinical studies validate the effectiveness of laser therapy.

A straight-forward guide to cold lasers and PhotoBioModulation—from low-cost home systems to high-end professional equipment.

I put this guide together because there's a lot of bad information floating around about cold lasers and PhotoBioModulation. After 15+ years in this industry, I've seen every marketing claim, every corner-cut, and every miracle promise. The truth? There are over 4,000 clinical studies showing laser therapy works. This isn't experimental—despite what insurance companies say when they deny coverage.

4,000+Clinical Studies

300,000+Healthcare Providers

750,000+Active Users

Cold lasers are everywhere now—chiropractors, acupuncturists, physical therapists, vets, dentists, podiatrists. Basically anyone who treats root causes instead of just masking symptoms. They're FDA registered for pain reduction, inflammation reduction, and increasing blood flow.

Power, Wavelength, Pulsing—That's It

When people call me asking which laser to buy, I tell them the same thing: almost everything comes down to three specs. Ignore the marketing fluff and fancy feature names. Focus on power, wavelength, and pulsing. These control how light travels through tissue and how your cells respond.

Power

Measured in milliwatts (mW) for Class 1-3b systems and watts (W) for Class 4.

I get this question constantly: "Does power really matter that much?" Yes. The market has basically agreed that power is the single most important factor in treatment efficacy. More power = faster results, shorter treatment times. Low-power manufacturers will find creative ways to justify their products, but the clinical data doesn't back it up.

My advice? Buy as much power as you can afford.

Wavelength

Measured in nanometers (nm). There's a therapeutic window where energy transfers best into tissue, which is why most lasers operate in specific ranges. Based on Dr. Hamblin's research:

600-660nm (Red) — Best for shallow treatments, lymphatic issues, acupoint therapy, skin conditions. Energy gets absorbed by blood and circulates throughout the body. Common in cosmetic applications.
800-860nm (IR Sweet Spot) — Maximum penetration depth combined with maximum photo-chemical reaction. Dr. Weber and Dr. Hamblin both promote 810nm as the optimal wavelength for mitochondrial interaction. This is where most of the action happens.
900-980nm (IR) — 905nm is standard for super-pulsing lasers. 980nm is common in Class 4 pain control systems. Great secondary wavelengths for inflammation management.

The best systems offer multiple wavelengths so you're not locked into one treatment approach.

Pulsing vs. Continuous Wave

Lasers can run continuously (CW) or pulse on and off at various frequencies. Companies like Erchonia use extremely low power and claim pulsing does all the heavy lifting. Companies like Apollo only make CW lasers, arguing that nobody really knows the optimal frequency anyway.

The truth is somewhere in the middle. A recent summary study by Huang et al. concluded that pulsing is best for most applications, except nervous system therapy where CW performs better. The systems I recommend most often offer both modes—because why limit yourself?

Understanding Laser Classes

Class	Power Limit	Best For	Notes
Class 4	500mW+ per diode	Practitioners, fast treatment	Risk of eye/tissue damage if misused. Training required.
Class 3b	<500mW continuous	Practitioners & home	Safe with basic precautions. Most versatile class.
Class 1M	Up to 500mW pulsed	Home use, safety priority	No eye damage unless focused through lens. ~100x stronger than Class 1.
Class 1-2	5mW max	Limited applications	Anything that looks like a laser pointer—skip it.

One thing worth noting: Class 4 lasers can now be sold for home use on pets and horses without restriction. For human home use, they still require a prescription, but most manufacturers have a doctor on staff who can write recommendations and provide training. It's not the hurdle it used to be.

If you already know what you're looking for, jump straight to the collection that fits your use case:

Home Systems Professional Equipment Veterinary Lasers

So What Should You Actually Buy?

Here's where I'll give you my honest take based on what I've seen work.

If You're a Practitioner Who Needs Speed

Class 4 is the move. Faster recoveries, shorter treatment times, patients in and out. I'd start with the ReGen Laser, ATPmax, or EVOlaser. They all have multi-step internal protocols that make it easy to get results from day one—even if you've never used a therapy laser before. For practitioners who want simple, powerful therapy without worrying about tissue heating, the Apollo desktop is a solid choice.

Best Overall Value

The Avant portables blow away the competition in this space. RED, Violet, and IR wavelengths. Pulsing and CW output. Broad and pinpoint treatments. All in one compact package. If you do acupuncture, the PowerMedic Pro is optimized specifically for that work. Desktop option for professionals: the Chattanooga Vectra Genisys.

When Safety is the Priority

For home users who don't want to think about eye protection or protocols, the TerraQuant/MR4 series are the obvious choice. There are more TerraQuant lasers in the world than all other brands combined—that's not an accident. Their super-pulsing technology delivers higher peak power than typical sub-3b lasers while maintaining the highest safety rating. You basically can't hurt yourself with these.

One more thing: If you're looking at systems on sketchy websites for under $2,000, read our article about laser scams and questionable products first. Anything that looks like a laser pointer (5mW) delivers such tiny dosages that most researchers consider them worthless. Don't waste your money.

Bottom line: More power = faster results. Compare every major brand side-by-side on our therapy laser comparison table.