Sunlighten Sauna Review: Models, Pricing and Warranty

STOP reading “lifetime warranty” on a Sunlighten page as lifetime, because Sunlighten’s own warranty page defines it as seven years, parts only. That one detail changes how the brand stacks up.

Here is the short answer. Sunlighten builds solid 120V infrared cabins with strong owner ratings (4.6 from 4,080 Trustpilot reviews) and some of the lowest entry prices among premium brands: the far infrared Signature I starts around $4,799 on sale and the full spectrum Amplify II around $5,799. The flagship mPulse line is quote only, at roughly $7,500 to $10,000 by third-party reports. Our scoring rubric gives the mPulse Believe a 7.4 out of 10.

We broke down the specs on all seven Sunlighten cabins in our database, read the warranty fine print line by line, and pulled owner feedback from Trustpilot and the BBB. Here is what we found.

Our Verdict on Sunlighten

Sunlighten is a good brand with one big catch. The heaters, the 120V wiring on most models, and the sales experience earn real praise from owners. The warranty is where it falls behind Clearlight: 7 years on cabinetry and heaters, 3 years on controls, 1 year on glass and audio, and no labor coverage at all.

If you want full spectrum heat on a regular 120V 20A circuit, the Amplify II is the value pick. It scores 7.5 on our rubric, the highest of any Sunlighten cabin with a published price. If you want separately controlled near, mid and far infrared zones with app programs, the mPulse line is the only reason to pay more, and you will have to call a sales consultant to get a price.

View at shop-us.sunlighten.com for Sunlighten Amplify II (2-Person, Obsidian) (opens in a new tab)

Who Sunlighten Is

Sunlighten, Inc. is based at 7373 W 107th St in Overland Park, Kansas. The BBB lists it at 27 years in business, accredited since July 2004, with an A+ rating (BBB).

Sunlighten says it manufactures its saunas in Vietnam and ships finished units to a Kansas City warehouse. It also says each sauna is assembled at the factory to check electrical components and EMF levels before shipping (Sunlighten craftsmanship page). Wiring and electronics are ETL-certified per the same page, and Sunlighten describes its saunas as FDA “General Wellness” products, not medical devices.

Woods are eucalyptus and basswood, kiln-dried, with a cedar interior option on mPulse. We found no parent company or sister brand.

Sunlighten Lineup and Prices

Sunlighten sells three cabin lines. Signature is far infrared only. Amplify adds full spectrum heaters at a lower price. mPulse is the flagship, with separately controlled near, mid and far infrared heaters plus red light.

Prices below are from the official US store on October 13, 2026. The store banner said the sale ends October 14, 2026, so check the current price before you buy.

Specs come from Sunlighten’s store pages and its BIMobject listings. The third-party mPulse prices come from online retailer Outliyr ($8,699 sale, $9,399 regular for the Believe) and from Infrared Sauna Lab figures dated April 2026 as cited by Peak Saunas, a competing brand (Aspire $7,499, Believe $8,499, Empower $9,999). The Conquer heater count comes from a long-term owner review by Michael Kummer.

Three things in this table matter more than they look:

• Amplify’s full spectrum comes from halogen lamps. The Amplify II store page lists 5 SoloCarbon far infrared heaters plus 3 halogen full spectrum heaters. The mPulse uses SoloCarbon heaters for near, mid and far. Our full spectrum vs far infrared comparison explains why the heater type matters.
• Amplify II wattage conflicts. The store lists 1,880W (15.67A), while Sunlighten’s BIMobject listing says 2,270W (18.92A). Both fit a 20A circuit, but ask Sunlighten which figure is current.
• mPulse electrical specs are not published for the Believe and Conquer. One owner review says current mPulse cabins need a dedicated 240V 20A circuit, and the same review also gives a 120V answer. Get the requirement in writing with your quote.

Which Sunlighten model to buy

• Solo users on a budget: Signature I. It is the cheapest Sunlighten cabin and fits a 37.8 x 39.8 inch footprint.
• Couples who want full spectrum: Amplify II. It costs about $1,000 more than the far-only Signature I and keeps the same 120V 20A circuit.
• Buyers who want zone control and app programs: mPulse Aspire (1 person, 120V) or Believe (2 person). Expect a sales call.
• Families: mPulse Empower, if you can add a 240V 30A circuit and handle a 977 lb cabin.

How Sunlighten Scores on Our Rubric

Our scoring rubric rates every sauna on seven weighted factors: heat performance (25%), build and materials (20%), warranty (15%), electrical and install ease (10%), EMF data and transparency (10%), owner feedback (10%) and value (10%). Any factor with missing data scores 4 out of 10. The rubric is explained on our how we research page.

Score breakdown: Sunlighten mPulse Believe (2-Person)

Calculated from specs, warranty terms and owner data with our published rubric. How we score

7.4out of 10

Factor	Weight	Score	Why
Heat performance	25%	10.0	Full spectrum, carbon heaters.
Build and materials	20%	10.0	Eucalyptus, basswood, or eucalyptus exterior with cedar interior.
Warranty and support	15%	7.0	7-year coverage on the main structure.
Electrical and install ease	10%	4.0	Voltage not listed by the manufacturer.
Manufacturer EMF data and transparency	10%	6.0	Manufacturer EMF claim with no published third-party report.
Owner feedback	10%	4.0	Owner rating not listed by the manufacturer.
Value for price	10%	4.0	Price not listed by the manufacturer.

We use the mPulse Believe as the brand’s flagship score in the verdict box: 7.4. Here is why Sunlighten lands in the 7s instead of the 8s:

• Warranty scores 7, not 10. A 7-year term falls in the rubric’s 5 to 9 year band. Clearlight’s true lifetime coverage scores 10.
• EMF scores 6. Sunlighten makes EMF claims and links a lab PDF, but we could not open that file to confirm what it measures, so the rubric treats it as a claim only.
• Owner feedback defaults to 4. The rubric scores per-model ratings, and Sunlighten publishes none. Its brand-level Trustpilot score of 4.6 would score higher if it were model-specific.
• mPulse value defaults to 4 because there is no published price to score.

Read those last two points fairly. Missing data drags Sunlighten down more than any weakness in the product. Publish prices and per-model ratings, and the mPulse would score higher.

Sunlighten Warranty: What the Fine Print Says

This is the section to read twice. Sunlighten markets a “lifetime” warranty. The warranty fine print shows it is seven years, in Sunlighten’s own words: “Warranty covers normal use for the product’s lifetime, defined as seven years” (Sunlighten warranty).

In plain terms, here is what that means for you:

• You pay for labor. The warranty says “Labor and technician costs are not covered.” If a heater fails in year 4, Sunlighten sends the part. You install it or pay someone to.
• You pay shipping. “The customer is responsible for all freight charges, including parts shipped for servicing the sauna.” Parts shipped more than 90 days after delivery are excluded from shipping coverage.
• Controls get 3 years. The power box sits in that 3-year bucket, and power box failures are a repeat theme in owner complaints (see below).
• It does not transfer. Coverage ends when ownership changes, so a used Sunlighten has no warranty.
• Your outlet matters. The warranty is void if the sauna runs on anything other than a dedicated wall outlet on a dedicated circuit. No power strips, extension cords or converters.
• Keep it 5 feet from water. Installing within 5 feet of a cold plunge, shower or tub voids coverage, as does water or pest damage.
• Indoor only. Sunlighten says its saunas “aren’t designed for outdoor placement.” If you put one outside, its cover must stay on at all times, including during use, or the warranty is void.
• One more condition: the sauna must be bought and put into use within 1 year of its manufacture date. US and Canada only.

For comparison, Clearlight’s indoor warranty covers the cabin, heaters, controls and audio for life, plus 7 years of labor. Our Sunlighten vs Clearlight comparison walks through what that difference means for a real repair.

Sunlighten EMF Claims vs the Evidence

Every Sunlighten line markets low EMF. Signature and Amplify say “a proprietary low EMF design.” The mPulse pages go further, saying the manufacturing process “reduces EMFs to levels that are virtually undetectable.”

The manufacturer-reported numbers come from Sunlighten’s safety page, which says Vitatech Electromagnetics readings from 2021 show heater panels “less than 1 mG, with some as low as 0.1 mG,” and elsewhere “0.5 mG or less” (Sunlighten safety page). That page links a Vitatech PDF. We could not open the PDF, so we cannot tell you which models, distances or seat positions it covers.

Two cautions. First, the published figures describe heater panels, not a measured reading where you sit in a named current model. Second, no figure is tied to a specific model in the page text. Treat every number here as manufacturer-reported. Our low EMF sauna guide shows which brands publish a full seat-level report (very few do).

Heat and Temperature

Sunlighten does not publish a maximum temperature for its cabins. Peak Saunas, a competing brand, cites Pure Recovery Lab figures from June 2026 of roughly 130 to 150F for Signature, up to 165F for Amplify and 170F for mPulse on the Heart Health program, and says Sunlighten’s user guide recommends 100 to 130F sessions (Peak Saunas). We could not confirm these figures with Sunlighten, so treat them as third-party estimates.

That fits what infrared is designed to do. Cleveland Clinic puts typical infrared sauna temperatures at 110 to 135F, well below a traditional sauna’s 150 to 195F (Cleveland Clinic). If you want 180F heat, read our infrared vs traditional sauna comparison first.

Electrical Needs and Running Cost

Most Sunlighten cabins need a dedicated 120V 20A circuit with a NEMA 5-20 outlet. That is not a standard 15A bedroom outlet. The mPulse Empower needs a dedicated 240V 30A circuit with a NEMA 6-30 outlet.

Use a licensed electrician to add or confirm the circuit, and ask whether your area needs a permit. Remember that the warranty is void on a shared circuit.

Running cost is low. At the US average residential rate of 18.31 cents per kWh (EIA, July 2026), a 45-minute session at full draw costs about:

• Signature I (1,350W): about $0.19
• Amplify II (1,880W): about $0.26
• mPulse Empower (5,580W): about $0.77

Heaters cycle once the cabin is warm, so real costs run lower. Try our sauna running cost calculator with your local rate.

Buying Terms: Shipping, Returns and Financing

Read the return policy before you order. Per the Amplify II store page:

• Shipping: free freight to the contiguous US, delivered on a pallet to your garage or paved driveway, with a stated 12 to 14 days. You assemble it with two people.
• Returns: within 30 days, and only if unopened in the original packaging. Sunlighten may charge a 3% administrative fee, a $499 restocking fee on Amplify, plus storage and return shipping fees. Opened saunas cannot be returned.
• Financing: Affirm (the page says “Starting at 0% APR” without a term), Klarna Pay in 4, and Truemed for HSA or FSA funds.

The mPulse line has no online checkout. You request a quote through a sales consultant (Sunlighten pricing page).

What Sunlighten Owners Report

Trustpilot: 4.6 from 4,080 reviews, with 86% five-star and 6% one-star, and 1,141 reviews in the past 12 months (checked October 13, 2026). Sunlighten invites reviews and replies to 97% of negative ones, often with templated replies (Trustpilot).

Owners consistently report:

• Praise: knowledgeable, low-pressure sales staff; solid build quality; easy setup; fast delivery.
• Complaints: trouble reaching support for repairs; shipping damage; failed power boxes; one reviewer says sales gave misleading spacing guidance.

BBB: A+ rating, accredited since 2004. The latest BBB reviews describe power supply failures (“The power supply has failed twice”), repeat replacements of heater panels, power boxes and LEDs across a set of four saunas, and a commercial buyer of seven units advising other businesses to “seriously reconsider” (BBB).

Peak Saunas, a competing brand, reports 46 BBB complaints closed in 3 years and 14 in the 12 months to August 2026, with themes of heater panels, power boxes, shattered glass doors, long delays on large orders and trouble cancelling (Peak Saunas). The BBB page we checked did not show those counts, so treat them as Peak’s figures.

The pattern is clear. Buying from Sunlighten is a good experience for most owners. When something breaks, the power box is the most common culprit, and that part has a 3-year warranty.

Pros and Cons

Pros

• Lowest entry price of the big premium infrared brands: Signature I around $4,799 on sale
• Most cabins run on 120V 20A, so no 240V service is needed
• mPulse offers separately controlled near, mid and far infrared zones with app programs
• 4.6 from 4,080 Trustpilot reviews, with replies to 97% of negative reviews
• States where it builds (Vietnam) and holds an A+ BBB rating

Cons

• “Lifetime” warranty is defined as 7 years, parts only, no labor, customer pays freight
• Controls, including the power box, get only 3 years, and power box failures recur in complaints
• mPulse is quote only, with no published electrical spec for the Believe or Conquer
• No returns once opened, plus a $499 restocking fee on Amplify
• No published max temperature and no readable seat-level EMF report

What Infrared Saunas Can and Cannot Do

Sunlighten’s mPulse ships with preset programs with names like “Heart Health.” Keep expectations grounded. A 2009 review of far infrared sauna research in Canadian Family Physician found limited moderate evidence that far infrared sessions may help normalize blood pressure, and concluded that manufacturers’ claims of numerous health benefits are “poorly supported” (Beever 2009).

Weight loss is the most common myth. Cleveland Clinic says sauna weight loss is water from sweating, not fat. Our infrared sauna guide covers what the research supports in more detail.

Talk to your doctor before using any sauna if you have a heart condition, high or low blood pressure, are pregnant, or take medications. Never use a sauna alone or after drinking alcohol. Cleveland Clinic suggests sessions of about 15 to 20 minutes, and 5 minutes for beginners.

Sunlighten Alternatives

If the warranty or quote-only pricing puts you off, these are the cabins we would compare first:

• Clearlight Sanctuary 2 (around $7,299 at a dealer): about $1,500 more than the Amplify II, but lifetime coverage on the cabin, heaters and controls plus 7 years of labor. It scores 8.4 on our rubric.
• Sun Home Equinox 2-Person (around $6,099 on sale): full spectrum on 120V 20A, with the same published dimensions and 1,880W rating as the Amplify II and the same 7-year warranty wording. It scores 7.9, helped by a published EMF summary and brand-site ratings.
• Health Mate Enrich 2 (around $5,300): plugs into a standard 120V 15A outlet and carries 10 years of labor on factory-installed parts, the longest labor term we found. It scores 7.8.
• Backyard Discovery Rylan 2-Person (around $1,999 on sale): far infrared only, but it links a signed Vitatech report measured at seat height (0.365 mG with heaters on) and covers every part for 5 years. It scores 8.3.

View at Heal With Heat for Clearlight Sanctuary 2 Full Spectrum (opens in a new tab)

For the full field, see our best sauna brands ranking and best full spectrum infrared saunas.