Sunlighten sauna review: lineup, prices, specs and what owners report

The short version

Sunlighten sells 16 indoor infrared saunas in four collections, from a lie-down Solo System at $2,099 to five-person mPulse cabins sold by quote. The listed cabins cost $4,999 to $10,299 on its US store. Its strengths are choice and engineering detail: four very different collections, 6 of its 15 cabins on a 120V circuit, published heater and EMF claims, and a 7-year warranty. Its weak spots are the outlay (a one-person cabin starts at $4,999), a strict return policy, indoor-only use, and owner complaints about after-sales support.

Good fit if

You want an indoor infrared cabin from an established brand, value low-EMF claims and controls, and are ready to pay for them.

Look elsewhere if

You want an outdoor sauna, a traditional steam sauna, a lifetime warranty, or someone to install it for you.

Best-value entry

Solo System ($2,099) if you are happy lying down; Signature I ($4,999) for a one-person cabin.

See Sunlighten's current offers (opens in a new tab) Every Sunlighten price

How we put this review together

We have not used a Sunlighten sauna, and we don't give scores. This is a desk review: specs and policies from Sunlighten's product pages and its US online store, prices from that store on October 9, 2026, and owner feedback from Trustpilot on October 9, 2026. Where Sunlighten's own pages disagree with each other, we say so. Health and technology claims are labelled as Sunlighten's. We earn a commission if you buy through our Sunlighten links; it does not change what we write (how we research).

The lineup at a glance

• Signature is the simple one: far infrared only, one button, one to four people. It is the cheapest cabin line and three of its four sizes run on 120V.
• Amplify adds halogen full-spectrum heaters, thicker insulation and double-pane doors for more heat, up to 170°F by Sunlighten's figure. Amplify RED adds red and near-infrared light panels and needs 240V at every size.
• mPulse is the flagship: red, near, mid and far infrared controlled separately in preset programs, with a built-in tablet and an app. One to five people, priced by quote.
• Solo System is a lie-down sauna: two sliding far-infrared domes over a heated pad, standard outlets, and it packs away.

Heaters, wavelengths and Sunlighten's claims

Every Sunlighten sauna uses SoloCarbon, Sunlighten's patented carbon-coated far-infrared heater. Sunlighten says independent testing found it 99% emissive, meaning almost all of the energy it puts out is infrared, and that its heaters are third-party verified for ultra-low EMF and VOCs. The heater covers are made with CELLIANT, a mineral-infused fabric that Sunlighten says adds another layer of infrared.

The collections differ in what is added on top. Amplify adds halogen heaters, which Sunlighten calls full spectrum, for a hotter, faster session. Amplify RED and mPulse add red and near-infrared light, which Sunlighten calls photobiomodulation. mPulse goes furthest: its PulseIQ system controls red, near, mid and far infrared separately and runs them in programs named for goals such as heart health, detoxification, muscle recovery and weight loss.

Treat the health side of this with care. Sunlighten says SoloCarbon is clinically shown to lower blood pressure and aid weight loss, and it links to studies on its research page. We have not assessed those studies. Much of the wider research on sauna use and heart health comes from long-term studies of traditional Finnish saunas, which run hotter than any infrared cabin. Anyone with a heart condition, low or high blood pressure, or who is pregnant should ask a doctor before using any sauna.

How hot they get

Sunlighten gives a maximum of up to 170°F for the Amplify and Amplify RED and 150°F for the Solo domes. It does not state a maximum for the Signature or mPulse. Infrared cabins usually run around 120 to 150°F, while a traditional Finnish sauna typically runs 150 to 195°F with steam, so even the Amplify is cooler than a traditional sauna. If high heat is the point for you, the infrared vs traditional guide explains the difference in feel.

Build, size and where it can go

Sunlighten cabins are solid-wood panels (basswood or eucalyptus, with a black "Obsidian" exterior option on some sizes) joined by Magne-Seal magnetic corners instead of clips or screws. They are heavy: the store lists 428 lb for a Signature I and 921 lb for an Amplify IV in eucalyptus. Cabins are about 78 to 79 in tall including 2 in feet; the store says they fit under a standard 8 ft ceiling and that panels pass a standard 30 in doorway. Sunlighten recommends 4 in of clearance from the walls and 12 in above.

All Sunlighten saunas are indoor-only; Sunlighten says they are not designed to be placed outdoors. The largest cabin seats 5.

Wiring

Every cabin needs a dedicated circuit; Sunlighten says a power strip or converter voids the warranty. 6 of the 15 cabins plug into a dedicated 120V 20A circuit (NEMA 5-20): Signature I, Signature II, Signature III, Amplify II, mPulse Aspire, and mPulse Believe. The rest need 240V 20A (NEMA 6-20), and the five-person mPulse Empower needs 240V 30A (NEMA 6-30). The Solo uses standard household outlets. Two store pages contradict the rest of Sunlighten's specs: the Amplify III Obsidian page says 120V, and the Signature IV page pairs a 240V plug with a 120V outlet. Confirm the outlet with Sunlighten before your electrician installs it. The electrical requirements guide lists every model.

Buying: prices, delivery, returns and warranty

• Prices. Signature, Amplify, Amplify RED and Solo have listed prices on Sunlighten's US store; mPulse is quote-only. The store usually shows a sale price below a higher "regular" price. Full list: Sunlighten sauna prices.
• Delivery. Free freight shipping on saunas, according to the store. Saunas usually ship in 3 to 5 business days, and the carrier can take 12 to 15 days to reach your area, then calls to book a slot. The sauna is left on a pallet in your garage or on a flat paved driveway, in two or three boxes of about 130 lb each. The carrier does not take it up steps.
• Assembly. You build it yourself: Sunlighten estimates two to three hours with two people. The listed price does not include installation, and at least one recent owner review asks Sunlighten to offer it.
• Returns. A non-custom sauna can be returned or exchanged within 30 days only if it is still in its original, unopened packaging. Opened saunas cannot be returned. Fees can include a 3% administrative fee, a $499 restocking fee per Amplify, mPulse or Signature cabin, storage, and return shipping. That makes it worth confirming size, wiring and access before you order.
• Warranty. Residential, US and Canada: 7 years on cabinetry and heaters, 3 years on controls, 1 year on glass doors and audio. The Solo domes and pad get 7 years, controls 3.
• Paying. Financing at checkout ("starting at 0% APR", subject to approval), pay in 4, and HSA/FSA through Truemed if a licensed provider approves a Letter of Medical Necessity after a health survey.

What owners report

On October 9, 2026, Sunlighten had a TrustScore of 4.6 out of 5 on Trustpilot from 4,077 reviews, 1,136 of them in the previous 12 months. Trustpilot notes that Sunlighten invites its customers to leave reviews, positive or negative, and that it replies to every negative review. For comparison, Trustpilot showed Clearlight at 4.4 (about 2,000 reviews) and Peak Saunas at 4.4 (66 reviews).

Trustpilot's own summary of recent reviews says most reviewers praise helpful, knowledgeable sales staff and the quality and ease of use of the saunas. The negative reviews cluster around what happens after delivery: long waits to reach support, missing parts or transit damage, owners having to do repairs themselves, and support hours that end at 5 pm.

Sunlighten also collects product reviews on Trustpilot. On the same date:

Pros and cons

Pros

• Four distinct collections, from a $2,099 lie-down unit to a five-person programmable cabin
• 6 cabins on a 120V circuit, including a two-person full-spectrum (Amplify II) and two mPulse sizes
• Published spec sheets with wattage, plug type and clearances for every model
• Third-party low-EMF and low-VOC verification claimed across the range
• Tool-free magnetic assembly, double-pane doors on the Amplify
• Financing and an HSA/FSA route through Truemed

Cons

• A significant outlay: $4,999 for the smallest listed cabin, before wiring
• mPulse, the flagship, has no listed price
• Opened saunas cannot be returned; $499 restocking fee on unopened returns
• 7-year warranty where some rivals state a limited lifetime warranty
• Indoor only; no outdoor or traditional (stove and stones) models
• Recurring owner complaints about after-sales support response times
• A few contradictory electrical specs on store pages

Which Sunlighten fits which home

• No room for a cabin, or renting: Solo System. Standard outlets, packs away, but you lie down alone with your head outside.
• Simple daily sessions on 120V: Signature I to III.
• You want it hot: Amplify II on 120V for two, or Amplify III and IV on 240V.
• You want red light built in: Amplify RED (240V) or mPulse.
• You want programs, an app, or seats for five: mPulse; get a written quote.

Each collection page links to the matching models on Sunlighten's site (opens in a new tab). Not sure about size or wiring? The sauna quiz matches every Sunlighten model, and the other brands we cover, to your space and circuit.

Alternatives to consider

• Clearlight: far-infrared Premier and full-spectrum Sanctuary cabins, outdoor Sanctuary models, a lie-down dome, and a limited lifetime residential warranty.
• Sun Home Saunas: infrared and full-spectrum cabins for indoors and outdoors, including full-spectrum three-person models on 120V.
• Peak Saunas: full-spectrum cabins, most with red light panels and app control, indoor and outdoor, with a 7-year warranty.
• HigherDOSE: a full-spectrum cabin and an infrared sauna blanket, if the Solo's footprint is still too big.

Visit Sunlighten (opens in a new tab) All Sunlighten models and specs

Frequently asked questions