As tanning salon owners explore adding red light therapy to their services, it’s time to clear up some of the biggest misconceptions. And trust me when I say that there are a lot of them.
I’m here to set the record straight—from understanding how to calculate joules to debunking hybrid tanning unit myths. Let’s get to it and make sure you have the facts to back up your offerings.
How To Calculate Joules From mW/cm²
When it comes to red light therapy, the dose matters. You can’t just shine a light on someone and expect magic. The effectiveness of red light therapy depends on the total energy delivered to the skin, measured in joules per square centimeter (J/cm²). If the dose isn’t high enough, the treatment won’t do much—if anything.
Here’s how to calculate it:
- Find the Power Density: This is measured in milliwatts per square centimeter (mW/cm²). Legitimate devices will provide this specification.
- Determine the Exposure Time: How long the light is applied, measured in seconds.
- Use the Formula:
Dose (J/cm²) = Power Density (mW/cm²) x Time (seconds) x 0.001
For example, if a device emits 10 mW/cm² and a client stays under it for 20 minutes, the energy dose is:
10 mW/cm² x 1200 seconds x 0.001 = 12 J/cm²
If you’re using a red light device and don’t know its power output, you might not be providing effective treatments at all. This is where a lot of salons miss the mark—assuming red light is beneficial no matter what, when in reality, the right dose is everything.
And here’s something else: just because a device covers a larger area doesn’t mean it delivers more joules. It simply means more skin is being exposed to the same total dose. Some companies market bigger devices as better, but the effectiveness comes down to the total energy delivered to each square centimeter, not the size of the unit.
The Benefits Of 1 To 5 Joules During A Tanning Session
Hybrid tanning beds that include red light therapy usually deliver between 1 to 5 J/cm² per session. While this isn’t enough for deep skin repair or pain relief, it does have some small perks:
- Boosted Circulation: Even low doses of red light can enhance blood flow, improving oxygen and nutrient delivery to the skin.
- Reduced Temporary Redness: A little red light exposure can help calm mild post-tan redness or irritation.
- Minimal Collagen Support: While higher doses are needed for real anti-aging effects, small amounts may provide a slight collagen boost when paired with other skincare treatments.
That said, it’s crucial to be honest with clients—1 to 5 joules isn’t enough for pain relief, muscle recovery, or deep skin rejuvenation. Managing expectations is key to maintaining trust and credibility.
The Truth About Hybrid Tanning Units
Now, let’s talk about hybrid tanning units—the ones combining UV tanning with red light therapy. Many salon owners think they’re offering a powerful two-in-one service, but here’s the reality:
- They don’t put out enough joules to relieve pain. Pain relief requires a much higher energy dose than what these units provide. Most hybrid beds don’t even come close.
- Legally, you can’t claim they treat pain. Unless the device is FDA-cleared for medical treatment, advertising pain relief can lead to legal trouble, especially when paired with tanning.
- They don’t deliver enough joules for real skin benefits. Want to help with wrinkles, collagen production, or skin tone? A dedicated red light therapy device is what you need, not a hybrid tanning bed.
If you’re offering hybrid tanning, be upfront about its limitations. Overselling what it can do will only lead to disappointed clients and hurt your reputation.
Unfortunately, some companies take advantage of the fact that many salon owners, or consumers, aren’t well-versed in red light therapy. They use flashy marketing and exaggerated claims that seem too good to be true—because they usually are. If a company promises drastic results in just a few sessions but doesn’t explain dosage or treatment consistency, that’s a major red flag.
Red Light Myths That Need To Go
Misinformation about red light therapy is everywhere, so let’s set the record straight:
- “Red Light Therapy Works Instantly.” Nope. It takes consistent sessions over time to see results. Most treatments require multiple visits per week for several weeks before noticeable improvements.
- “More Intensity Means Faster Results.” Higher power doesn’t necessarily mean better. It’s all about the total energy dose. Overloading the skin with excessive intensity can actually reduce effectiveness and cause adverse effects.
- “All Red Light Devices Are the Same.” Not even close. Some are high-quality and scientifically backed, while others are nothing more than red-tinted bulbs with no real benefit.
- “Red Light Therapy is Like a Tanning Bed.” Not at all! Red light doesn’t tan or burn skin because it lacks UV rays. If a client expects a tan from red light, they’re in for a surprise.
- “You Can’t Overdo Red Light Therapy.” Actually, you can. Too much exposure can overstimulate cells, making treatments less effective. Sticking to the right dose is key.
- “Any Red Light is Therapeutic.” Just because a device emits red light doesn’t mean it’s doing anything useful. The right wavelengths (typically 600-850nm) and adequate energy levels are what matter.
The Bottom Line
If you’re offering red light therapy in your salon, make sure you know what it can and can’t do. Do the math, be honest with your clients, and don’t make claims that could land you in trouble. Most hybrid tanning beds and lower-power red light units simply don’t provide enough joules for serious therapeutic benefits.
Bigger doesn’t mean better when it comes to red light therapy. A larger coverage area just means more skin is exposed to the same total dose—not that it’s receiving more energy. Don’t let misleading marketing convince you otherwise. Some companies rely on the fact that salon owners and consumers don’t fully understand the science, using that to push unrealistic claims. If it sounds too good to be true, it probably is.
Red light therapy is an incredible tool, but only when used correctly, with the right dose. Don’t fall for the hype, and don’t let your clients fall for it either!
