Peak Saunas vs Sunlighten vs Clearlight | Comparison

Where Clearlight wins

An honest three-way comparison starts with what the other two companies genuinely do better. As of August 2026:

• Longest track record and a doctor-founder. Clearlight (Sauna Works, Inc., Berkeley, CA) has built infrared saunas for roughly 28 years under founder Dr. Raleigh Duncan, a Board-Certified Doctor of Chiropractic who designed its patented True Wave™ heaters and still fronts the brand. If heritage is your first filter, Clearlight earns it outright.
• The broadest lifetime warranty headline. Clearlight's residential warranty is a limited lifetime warranty described as covering "the entire sauna" — heaters, controls, electrical, wood, even the audio system — with 5-year commercial coverage (verified on their warranty page, August 2026).
• The Jacuzzi® license and in-person availability. Clearlight has held an exclusive license with Jacuzzi Inc. since 2017 and is the exclusive sauna supplier to the Perspire Sauna Studio franchise chain — a Perspire session is effectively a test sit before you buy.

Where Sunlighten wins

• A 25-year brand with real engineering IP. Sunlighten has built infrared saunas since 1999. SoloCarbon® is its own patented far-infrared heater line — the patent page lists 21 US patents plus Canadian and Australian filings.
• Preset heater programs. The mPulse line offers seven preset modes (Heart Health, Detoxification, Muscle Recovery, Relaxation, Weight Loss, Anti-Aging, Customize) that automatically vary heater output over a session, from the cabin screen or app.
• Dealer, showroom, and commercial reach plus a published research program. Sunlighten sells into spas, gyms, and medical practices at scale, operates its own day spa, and publishes a research page with named, PubMed-linked studies, including a 2018 Auburn University flexibility study.

Where Peak wins

• Red light therapy included standard, with the dose data published. Every Peak full-spectrum model ships with a built-in full-body panel: 8 wavelengths (630–1060nm) from 216 dual-chip LEDs, with irradiance published at three distances: 175 mW/cm² at 6", 107 at 12", 80 at 24". As of August 2026, Sunlighten publishes no wavelength or irradiance figures on its mPulse pages, and Clearlight's red light therapy is a separate quote-gated tower add-on — not included with any sauna. Dose is irradiance × time; a light-therapy claim without an irradiance figure is a dose the seller won't state.
• Guided wellness included free for life. The Peak Wellness Club is included free for life with every Peak sauna — daily guided sessions, 30-day wellness programs, and expert protocols — which no other sauna brand includes. Sunlighten's mPulse presets are heater cycles, and Clearlight publishes no comparable included program as of August 2026.
• Published pricing. Every Peak price is on the website — $5,950 to $16,750 — with free shipping, 0% APR up to 24 months, and HSA/FSA eligibility via Truemed. Both competitors are quote-gated as of August 2026.
• A clean, verified review record. Peak holds a 4.76/5 average across 3,900+ verified purchase reviews (Judge.me), each tied to a completed order at peaksaunas.com — the only place Peak sells — and is BBB accredited, A+, with zero complaints filed.

Spec-by-spec: Peak vs Sunlighten vs Clearlight

Peak figures come from our engineering documentation and live product pages; competitor cells were verified against sunlighten.com and infraredsauna.com on August 4, 2026. "Not published" means the figure does not appear on the company's official pages as of that date — itself worth knowing before you buy.

What a 2-person full-spectrum sauna actually costs

This is the size most buyers compare, and where the pricing-model difference shows up most clearly. Peak publishes both of its 2-person prices: the Everest is $7,850 (hemlock, 120V/20A, full-body red light panel included) and the best-selling cedar Fuji is $7,950 (120V/20A, XL red light panel included) — both with free shipping and 0% APR up to 24 months.

Neither competitor publishes a comparable number: Sunlighten and Clearlight both route every cabin to a "get pricing" form and sales consultation as of August 2026 — and Clearlight's red light tower is a separate quote on top of the cabin, while it is already inside Peak's published price. Whatever quotes you receive, compare the total delivered price with red light therapy included, in writing, against $7,950 and $8,250.

Questions to ask all three companies

Put these in writing to all three companies. The answers — and the refusals — will tell you most of what this page can't.

• "What is the total delivered price, in writing, with red light therapy included?" Cabin, light therapy, shipping, and accessories on one itemized quote. Peak's answer is on the website.
• "Which exact wavelengths, in nanometers, does your red light system emit — and what is the irradiance in mW/cm² at seated distance?" A therapeutic panel specifies both; marketing copy doesn't.
• "What does 'lifetime warranty' mean in your written terms?" What is defined, for how long, what is excluded, and who pays freight and labor on replacement parts.
• "Are your preset session modes guided programs or heater schedules?" Have the salesperson walk through exactly what a "wellness program" does, and what ongoing content is included at no charge after the sale.
• "What is the current lead time to delivery, and when is payment due?"

Frequently asked questions

Is Peak Saunas or Sunlighten or Clearlight better?

It depends on what you're buying for. Clearlight is better on heritage: ~28 years, a doctor-founder, a Jacuzzi® license, and the broadest lifetime-warranty headline. Sunlighten is better on brand maturity: 25+ years, patented SoloCarbon® heaters, mPulse preset heater programs, and a large dealer network. Peak is better on included value: full-body red light therapy standard — 8 wavelengths (630–1060nm) with published per-distance irradiance — the Peak Wellness Club free for life, and published pricing (2-person from $4,950 with the Crown; Everest $7,850, Fuji $7,950 — vs quote-gated at both competitors).

How much do Sunlighten and Clearlight saunas cost?

Neither publishes cabin prices — both are quote-gated as of August 2026, and Clearlight's red light tower is a separate quote on top. Third-party reviewers in 2026 place well-equipped cabins from both brands in the five-figure range. Peak publishes every price: $4,950 to $16,750, with 2-person models from $4,950 (Crown), plus the Everest ($7,850) and Fuji ($7,950).

Which of the three includes red light therapy?

Only Peak includes it standard: every full-spectrum model ships with a full-body panel — 8 wavelengths (630–1060nm), 216 dual-chip LEDs, irradiance published at 6, 12, and 24 inches. Sunlighten builds red and near-infrared into heater elements and lumiNIR® modules but publishes no wavelength or irradiance figures. Clearlight sells red light therapy as a separate tower add-on (140 LEDs, 650nm + 850nm) at quote-gated pricing.

Which brand has the best warranty?

Read the written terms, not the headlines. Clearlight's residential warranty carries the broadest description — limited lifetime covering the entire sauna; 5 years commercial. Peak's is limited lifetime on structure, wood, and heating elements (defined as 7 years residential), 7 years on the red light panel, with lifetime U.S.-based support. Sunlighten's residential terms are 7 years cabinetry and heaters, 3 years controls, 1 year glass doors and audio — with the customer paying freight on parts shipped for servicing, per its warranty page as of August 2026.

Do any of these brands include guided wellness programs?

Only Peak. The Peak Wellness Club is included free for life with every Peak sauna — daily guided sessions, 30-day wellness programs, and expert protocols — which no other sauna brand includes. Sunlighten's mPulse presets vary heater output over a session — useful automation, but a heater schedule, not guided content. Clearlight publishes no comparable included program as of August 2026.

What about EMF claims?

We cover EMF marketing claims separately, in one place: EMF facts.

Disclosure: This three-way comparison is published by Peak Saunas, a direct competitor of Sunlighten and Clearlight. Both competitors receive category wins above — Clearlight on track record, founder heritage, warranty breadth, and in-person availability; Sunlighten on brand maturity, patented heater technology, preset heater programs, dealer reach, and published research — based on their genuine strengths. Competitor specifications were verified against sunlighten.com and infraredsauna.com on August 4, 2026, and linked in the sources below; Peak pricing was verified against live product pages the same day. Competitor prices are described qualitatively because both are quote-gated. Sunlighten®, SoloCarbon®, mPulse®, lumiNIR®, Clearlight®, True Wave™, and Jacuzzi® are trademarks of their respective owners; Peak Saunas is affiliated with none of them. Nothing in this article is medical advice; saunas are wellness products, not medical devices.

Sources reviewed

• Sunlighten — mPulse collection page (preset programs, quote-gated pricing; accessed Aug 4, 2026)
• Sunlighten — warranty terms (accessed Aug 4, 2026)
• Sunlighten — patent list (accessed Aug 2026)
• Sunlighten — clinical studies and research page (accessed Aug 2026)
• Clearlight — red light therapy towers (specs, add-on status; accessed Aug 4, 2026)
• Clearlight — warranty (accessed Aug 4, 2026)
• Clearlight — founder, Dr. Raleigh Duncan
• Trustpilot — Sunlighten and Trustpilot — Clearlight (accessed Aug 2026)
• Hamblin MR (2017), mechanisms of photobiomodulation — PubMed
• Laukkanen T et al. (2015), sauna bathing and cardiovascular outcomes, JAMA Intern Med — PubMed

Want the head-to-head detail? See Peak vs Sunlighten, Peak vs Clearlight, and Peak vs Sun Home — or start with the best red light therapy saunas guide (2026) and shop all Peak saunas.

© Peak Saunas. Wellness products, not medical devices.