Sunlighten Signature III Far Infrared Sauna
- Far infrared
- 3 people
- Up to 141-160°F
- 120V dedicated (20A)
SVT Score, Lower
A three-person indoor far infrared cabin with an Obsidian exterior and ten carbon panels, on a dedicated 120 V circuit.
$6,399
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Usability
4.2 out of 10
- Size: 62.3 by 45.9 by 77.7 in outside, 622 lb
- Glass: door not stated as tempered on the spec sheet
- Not included: app control, an adjustable vent and a backrest (backrests sold separately)
Better on features & water careSun Home Eclipse 2 infrared saunaAn app. $9,999Scores 7.0- Searched: Intertek CSA UL CPSC Health Canada
Better on verificationSun Home Luminar 2 outdoor sauna$10,999Scores 6.0- Returns: 30 days, unopened only, less a $499 restocking fee and a 3% fee
Better on warranty & supportHealth Mate Enrich 2 SaunaThe controls carry ten years. $5,300Scores 10.0Strengths
- Gentle far infrared heat from carbon panels
- Fabric covers over the infrared heaters
- Chromotherapy lights and Bluetooth audio built in
- Simple controls with a preheat timer
- Thick solid wood sides
- Runs on household voltage
Drawbacks
- Lower top temperature and gentler heat
- Less heater output for each seat
- Parts-only warranty with no labour cover
- No app or Wi-Fi control
- Store pages make wellness claims we do not assess
A roomy, simple cabin, but its heaters are spread thin
Specs
- TypeInfrared
- HeaterFar infrared
- FormCabin
- PlacementIndoor
- Seats3 people
- Max Temperature141-160°F
- Min TemperatureNot applicable
- Capacity (Gallons)Not applicable
- ChillerNot applicable
- HeatsNot applicable
- Water CareNot applicable
- Power Supply120V dedicated (20A)
- EMF Claimed"Low EMF" with no figure
- EMF MeasuredNot measured
- CertificationsClaimed only
- Warranty3 Years
At a glance
- Ten carbon panels
- Side glass panel
- Magnetic-lock panels
- The company is based in Leawood, Kansas, and was founded in 1999.
- Sunlighten bought the assets of a cold-plunge maker in May 2025 and runs them as its subsidiary Ice Barrel, LLC.
- That subsidiary's own store also sells the Amplify line.
- Sunlighten, Inc. sells saunas from a one-person dome to four-person full spectrum cabins on its own US store, shop-us.sunlighten.com.
- Its mPulse cabins are sold through sauna consultants without a priced cart.
- No Sunlighten store or listing was found on Amazon US in November 2026.
The Sunlighten Signature III is a three-person indoor far infrared cabin with ten SoloCarbon carbon panels drawing 2,250 W in total. It needs a dedicated 120 V 20 A circuit with a NEMA 5-20 outlet, fed by a 10 ft cord that leaves the roof.
It measures 62.3 by 45.9 by 77.7 inches outside and 56.8 by 39.9 by 70.3 inches inside, weighs 622 lb, and has a 28 inch door. The manual sets it to 150.8°F by default, and the brand gives 100 to 150°F as the range of its infrared cabins.
Chromotherapy lights, a Bluetooth sound system, fabric heater covers and a programmable timer with a reservation mode come with it. This listing is the Obsidian exterior with a eucalyptus interior, and a side glass panel sits beside the door. Backrests, cushions and comfort packages are sold separately.
Panels lock together with magnets and arrive by freight to the garage.
Questions answered from our data
Is Sunlighten good?We list nine Sunlighten products and score nine of them. Their overall scores run from 3.9 to 5.1, with a median of 4.8, against a median of 5.3 for all 91 products we score.
How much does a home sauna cost?The 81 home saunas we list run from $1,999 to $36,399, with a median of $7,523.
How hot does a sauna get?Of the 81 home saunas we list, 81 state a rated maximum temperature; the most common is 186-194°F (42).
How big is a 2-person sauna?24 of the 81 home saunas we list seat two, as their makers count seats.
