If you're spending $5,000 to $12,000 on an infrared sauna, you owe it to yourself to compare the top brands head-to-head. Sunlighten and Clearlight are the two most commonly compared brands in the premium infrared sauna space. Both have been around for decades, both charge premium prices, and both have loyal followings.
But there's a third option most buyers don't discover until deep in their research: Peak Saunas. And once you see the comparison side by side, the decision becomes clearer.
This is a real comparison — technology, price, warranty, what you actually get. No fluff.
Quick Overview: Who Are These Brands?
Sunlighten — Founded 1999. Medical-focused, patented SoloCarbon® heaters. Backed by clinical research partnerships. Premium price point ($5,499–$11,999). Sold through dealers.
Clearlight Saunas — Founded 1997. Wellness-focused, True Wave™ low-EMF heaters. Celebrity health endorsements. Premium price point ($5,449–$9,999+). Dealer model.
Peak Saunas — Newer market entrant. Direct-to-consumer, full-spectrum infrared + integrated medical-grade red light therapy. Transparent pricing ($5,950–$10,250). Limited lifetime warranty. Ships direct, no dealer markup.
Complete Feature Comparison
| Feature | Sunlighten | Clearlight | Peak Saunas |
|---|---|---|---|
| Full-Spectrum Infrared | ✅ Yes | ✅ Sanctuary series only | ✅ All models |
| Far Infrared Only Option | ✅ mPulse series | ✅ Essential/Premier | ❌ Full-spectrum standard |
| Medical-Grade Red Light Therapy | ❌ Not included | ❌ Optional add-on | ✅ Built-in standard |
| Low EMF Technology | ✅ Yes | ✅ Yes (Clearlight's primary focus) | ✅ Yes (standard) |
| WiFi / App Control | ✅ Yes | ✅ Yes | ✅ Yes |
| Warranty | 5–7 years | Lifetime | Lifetime |
| Sales Model | Dealer network | Dealer network | Direct-to-consumer |
| Entry Price (1-person) | ~$5,499 | ~$5,449 | ~$5,950 |
| Top-Tier Price | $11,999+ | $9,999+ | $10,250 |
Technology Deep Dive
Infrared Heater Technology
All three brands use carbon heater panels rather than ceramic (the older, less effective technology). The differences are in heater design and proprietary claims.
Sunlighten's SoloCarbon® heaters are their most distinctive feature. They hold patents on this heater design and have conducted third-party clinical research — including studies with the University of Missouri-Kansas City showing blood pressure benefits. The research backing is the strongest of the three brands.
Clearlight's True Wave™ heaters emphasize EMF/ELF reduction as their primary focus. Clearlight has long positioned themselves as the safest option from an electromagnetic field perspective. Independent testing supports their low-EMF claims. Worth noting: the World Health Organization's research does not identify typical household EMF levels as a health risk — but if this is important to you, Clearlight takes it seriously.
Peak Saunas uses high-emissivity carbon heaters with full-spectrum output across all models. The technology delivers near, mid, and far infrared across all wavelengths without requiring you to buy up to a premium tier (unlike Clearlight's Sanctuary series requirement for full-spectrum).
Verdict on heaters: Sunlighten has the most documented clinical research. Clearlight has the most aggressive EMF-reduction focus. Peak delivers full-spectrum — near, mid, and far infrared simultaneously — as a standard rather than an upgrade.
The Red Light Therapy Difference
This is where Peak Saunas creates a genuine differentiator.
Peak Saunas integrates medical-grade, full-body red light therapy panels as a standard feature in their full-spectrum models. These aren't decorative LED strips — they're purpose-built panels delivering wavelengths in the 630–850nm range (red and near-infrared light), specifically calibrated for photobiomodulation.
Red light therapy at these wavelengths supports:
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Skin health — collagen synthesis, reduced fine lines
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Cellular energy — ATP production via mitochondrial stimulation
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Recovery — reduced delayed-onset muscle soreness infrared sauna for muscle recovery
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Inflammation — modulation of inflammatory cytokines infrared sauna for inflammation and pain
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Wound healing — tissue repair acceleration
Sunlighten does not include red light therapy. Their mPulse and Amplify models focus entirely on infrared. Adding red light would require a separate device purchase ($500–$2,000+ for a quality panel).
Clearlight offers red light as an add-on — you can purchase panels separately, but they aren't integrated into the standard sauna design and add cost to an already premium price point.
With Peak Saunas, both modalities are integrated from day one. That combination in one unit represents meaningful additional value at comparable price points.
Price Comparison: What You Actually Pay
This is where the comparison gets important.
Sunlighten Pricing (approximate, dealer-dependent)
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Solo (1-person): $5,499–$6,999
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2-person: $8,999–$10,499
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3-person: $11,499–$11,999
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Installation: $500–$1,500 depending on dealer
Sunlighten prices include a dealer margin. You're not buying direct — you're buying through a dealer network, which means prices can vary and negotiation is sometimes possible but rarely transparent.
Clearlight Pricing (approximate)
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Essential Series (far-infrared, 1-person): ~$3,999–$4,999
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Sanctuary Series (full-spectrum, 1-person): ~$6,499–$7,499
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Sanctuary 2 (full-spectrum, 2-person): ~$8,499–$9,499
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Sanctuary 3 (full-spectrum, 3-person): ~$9,499–$9,999+
Important Clearlight note: If you want full-spectrum, you must buy the Sanctuary series. Entry-level Essential or Premier models are far-infrared only. Many buyers don't realize this until deep in the process.
Peak Saunas Pricing (direct from manufacturer)
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Solo (1-person, full-spectrum + red light): $5,950
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Alto (2-person, full-spectrum + red light): $7,950
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Summit (3-person, full-spectrum + red light): $9,950
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Large family models: up to $10,250
Direct comparison: At the 2-person, full-spectrum level, Peak Saunas ($7,950) vs. Clearlight Sanctuary 2 ($8,499+) — Peak is less expensive, includes red light therapy, and comes with a limited lifetime warranty. You're not paying a dealer margin.
Warranty Comparison
| Brand | Warranty | Notes |
|---|---|---|
| Sunlighten | 5–7 years | Varies by model and component |
| Clearlight | Lifetime | Industry-leading |
| Peak Saunas | Lifetime | Matches Clearlight |
Sunlighten's warranty is respectable but limited compared to the other two. Clearlight and Peak Saunas both offer lifetime warranties — a meaningful difference when you're buying something you expect to use daily for 20+ years.
The Buying Experience
Sunlighten
You'll interact with a dealer or Sunlighten's internal sales team. The process is consultative — they'll walk you through models, options, and scheduling delivery. Expect a longer sales cycle, potentially multi-call. Pricing may vary by dealer.
Clearlight
Similar dealer model. Clearlight dealers (often branded as "Heal With Heat") are wellness-focused and knowledgeable. The experience tends to be smooth, but you're still adding dealer margin to the price.
Peak Saunas
Direct-to-consumer. You buy on the website, like any other ecommerce purchase. No dealer, no upsell pressure, transparent pricing. Assembly is DIY (45–60 minutes) with good instructions. If you're comfortable with flat-pack furniture, you're comfortable with Peak Saunas.
Who Should Choose Each Brand?
Choose Sunlighten if:
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Clinical research credibility is your top priority
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You want the most documented health outcomes (blood pressure studies, etc.)
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You're willing to pay a premium for brand prestige and track record
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A dealer relationship and guided purchase experience appeals to you
Choose Clearlight if:
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EMF reduction is your top priority and you want the brand most focused on this
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You want a premium brand with strong practitioner endorsements
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You're buying specifically for the Sanctuary series full-spectrum technology
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You value the Clearlight community and dealer support network
Choose Peak Saunas if:
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You want full-spectrum infrared AND red light therapy without buying two separate products
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Transparent, direct pricing matters to you (no dealer markup)
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A limited lifetime warranty is non-negotiable
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You want the best value in the premium category
The Honest Bottom Line
Sunlighten and Clearlight are both excellent saunas with decades of market presence and genuine customer satisfaction. If you buy either one, you'll get a quality infrared sauna.
But the math at the full-spectrum tier is hard to ignore:
Peak Saunas delivers full-spectrum infrared plus integrated medical-grade red light therapy, at comparable or lower pricing than Sunlighten or Clearlight's equivalent models, with a limited lifetime warranty, and without a dealer margin.
For a first-time buyer who wants everything in one unit and doesn't want to pay for brand legacy, Peak Saunas is the most rational choice.
Frequently Asked Questions
Q: Is Sunlighten or Clearlight better? Both are excellent brands. Sunlighten has more clinical research backing. Clearlight has stronger EMF-reduction focus and a well-regarded dealer network. The choice usually comes down to personal priorities. Peak Saunas is worth adding to the comparison — it matches or exceeds both on most objective measures at a competitive price.
Q: Is Peak Saunas as good as Sunlighten? On technology (full-spectrum infrared), Peak Saunas is comparable to Sunlighten's top-tier models. Peak adds medical-grade red light therapy that Sunlighten doesn't offer. Sunlighten has more clinical research on file. Both deliver genuine infrared therapy. Peak wins on price-to-feature ratio.
Q: Why is Clearlight more expensive than Peak Saunas? Clearlight uses a dealer model — you're paying dealer margin plus the brand premium from 29 years in the market. Peak Saunas sells direct-to-consumer, passing that savings to buyers. The technology is comparable at the full-spectrum tier.
Q: Does Peak Saunas have research like Sunlighten does? Sunlighten has published clinical studies with university partners. Peak Saunas relies on the established body of infrared sauna research (which is extensive) rather than proprietary clinical trials. If peer-reviewed research specifically on your sauna's heater design matters, Sunlighten leads here.
Q: Is the red light therapy in Peak Saunas worth it? Red light therapy has robust research support for skin health, cellular energy, and recovery. Having it integrated — rather than purchasing a separate panel — adds genuine value. For buyers who would consider adding red light therapy to their wellness routine, it's a meaningful differentiator.
Ready to Compare Models?
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This comparison was last updated May 2026. Prices and specifications are subject to change; verify current details directly with each manufacturer.