Installed infrared cabin

SunlightenAmplify II

Name: Sunlighten Amplify II
Brand: Sunlighten
Price: 5999.00 USD

Two-person cabin with eight heaters on a dedicated 120 V circuit

By Porsche Ma Facts checked Oct 13, 2026

Source-based analysis, not hands-on testing. Our method

Cofounder of Superhuman Chambers · About the author. General information, not medical advice. No independent clinical review is claimed.

The verdict

Amplify II is a two-person cabin with a black exterior, eucalyptus inside, five far-infrared heaters and three halogen heaters. It's on sale for $5,999 and runs on 120 V, but it needs its own 20 A circuit. The catch: you can't return it once it's opened, and the warranty doesn't cover labor.

The trade-off

Opened saunas can't be returned, warranty labor is on you, and the panel magnets can affect pacemakers.

Sunlighten Amplify II, manufacturer product image — Photo: Sunlighten.Source ↗

Model reviewed: 2-person installed infrared cabin, black Obsidian exterior with eucalyptus interior, no red-light option

$5,999

US price, checked Oct 13, 2026

Check price at Sunlighten

No affiliate commission on this link. Check the exact variant before buying.

About this price

Sale price on Sunlighten's online store on Oct 13, 2026, against a regular price of $6,899. The product page itself showed $5,799 for a "Fall Reset Event" ending October 14, 2026, with the discount applied at checkout. That extra $200 isn't counted here. The store listed the 2-person Eucalyptus Black Edition as available, and the page said "Ready to Ship" and "Arrives in 12-14 days". Freight shipping was free in the contiguous US. The price is before tax. Affirm, Klarna and Truemed (HSA/FSA) are ways to pay, not discounts.

A GOOD FIT FOR

Two people with a dedicated 120 V, 20 A circuit, about 51 × 46 in of indoor floor and a paved path for freight.

Two people with a dedicated 120 V, 20 A circuit and NEMA 5-20R outlet at the spot, or plans to add one
A room with a standard 8 ft ceiling and about 51 × 46 in of floor, reached through a 30 in doorway
You want a listed price you can add to cart and delivery in about two weeks, not a sales quote
You want far-infrared and halogen full-spectrum heaters on 120 V household power

THINK TWICE IF

A home where you can't add a dedicated 20 A circuit
An outdoor spot, since Sunlighten says its saunas aren't designed for it and the warranty then depends on a cover
A spot within 5 ft of a shower, bathtub or cold plunge, which voids the warranty
You have a pacemaker: Sunlighten warns the magnets used to assemble its saunas can interrupt pacemakers
An address without a flat, paved path to the garage door, since the carrier won't take the pallet up steps
You might want to return it after opening the boxes
You want integrated red light, which isn't available on this model

What still needs checking

The maximum cabin temperature
The wattage of each heater and average power use during a session
Measured EMF or ELF values and how they were tested
Whether an ETL or UL listing covers this exact model, and its file number
How much clearance it needs and whether it needs GFCI protection
Carton weights, since two to three boxes at 130 lb each don't add up to the 541 lb listed weight
Whether the $5,999 sale price lasts past the October 14 sale

The practical details.

Specifications for Sunlighten Amplify II
Exact variant	2-person installed infrared cabin, black Obsidian exterior with eucalyptus interior, no red-light option
Heaters	5 SoloCarbon far-infrared heaters and 3 halogen full-spectrum heaters. Wattage of each isn't stated
Electrical	120 V, 1,880 W, 15.67 A. Dedicated 120 V, 20 A circuit with a NEMA 5-20R outlet
Inside and seating	45.4 W × 39.9 D × 70.3 H in. One bench, 45.2 W × 20.3 D in and 19.5 in high, for one or two people
Weight	541 lb
Delivery and assembly	Freight on a pallet to your garage or a flat, paved spot on the driveway. Two people assemble it in about 2 to 3 hours
Options	Eucalyptus or Obsidian at the same price, basswood $200 less. Integrated red light isn't available. The 3-person size costs $1,000 more
Extras	Bluetooth sound system, chromotherapy lights and controls that let you lower the temperature
Warranty (home use)	7 years on cabinet and heaters, 3 years on controls, 1 year on glass door and audio. Labor not covered
Dimensions	Outside: 50.9 W × 45.9 D × 77.7 H in, including 2 in feet. Inside: 45.4 W × 39.9 D × 70.3 H in. The door opening is 28 in. The bench is 45.2 in wide and 20.3 in deep, 19.5 in off the floor. It weighs 541 lb. Sunlighten says it fits under a standard 8 ft ceiling and its panels fit through a standard 30 in doorway. The product page gives no clearance to leave around the cabin.
Materials	The outside has a limited-edition black finish that Sunlighten calls Obsidian. The inside is natural eucalyptus, which Sunlighten says is sustainably sourced. Plain eucalyptus costs the same, and basswood is $200 less. It comes with a CELLIANT heater cover.

Before you buy

InstallationIt needs a dedicated 120 V, 20 A circuit with a NEMA 5-20R outlet

It needs a dedicated 120 V, 20 A circuit with a NEMA 5-20R outlet. Sunlighten rates it at 1,880 W and 15.67 A. The product page tells you to book an electrician so the outlet is ready, but doesn't mention GFCI protection. Under Sunlighten's warranty, a power strip, extension cord, converter or non-dedicated circuit voids coverage. So does placing it within 5 ft of a shower, bathtub or cold plunge. Sunlighten says its saunas aren't designed to be placed outdoors. If you put one outside anyway, its separately sold cover and plastic sheet must stay on, even during sessions, or the warranty is void. Freight needs a flat, paved surface up to your garage door. The carrier leaves the sauna on a pallet in the garage or on the driveway and can't take it up steps. A local agent calls to schedule delivery. It ships in two to three boxes of 130 lb each, and Sunlighten says to have at least two people to unpack. The Magne-Seal panels lock together without screws or nails. Sunlighten says two people take about 2 to 3 hours. Its support page links an owner's manual, spec sheet, assembly guide and power box guide, but those PDFs couldn't be opened for this review.

WarrantyThe product page shows a 7-year warranty badge

The product page shows a 7-year warranty badge. Sunlighten's warranty page groups Amplify with its other cabin saunas. For home use, the cabinet and heaters get 7 years. The cabinet includes the benches, floor grates and heater cover frames. The controls (in-sauna tablet, control pad and power box) get 3 years. The glass door and audio get 1 year, and chromotherapy lighting has its own 1-year term. Commercial use gets 5 years on the cabinet and heaters and 1 year on everything else. The warranty's disclaimers say labor and technician costs aren't covered. You pay all freight, including on parts shipped for service. Coverage is for the original buyer only and ends if you sell the sauna. It's void on a power strip, extension cord, converter or non-dedicated circuit, or within 5 ft of a shower, bathtub or cold plunge. Sunlighten says its saunas aren't designed for outdoor use. Outside, the separately sold cover and its plastic sheet must stay on at all times. The sauna must be bought and put into use within a year of its manufacture date.

ReturnsYou have 30 days from delivery to start a return or exchange…

You have 30 days from delivery to start a return or exchange, and the sauna must be in its original, unopened packaging. Opened saunas can't be returned or exchanged. Returns, exchanges and cancellations may carry a 3% administrative fee and a $499 restocking fee for each Amplify sauna. Storage fees for re-routing the sauna and return shipping to the warehouse may also apply. Exchanges can add shipping back to you. If it hasn't shipped, you cancel by emailing your sales representative, or through Sunlighten's order portal if you don't have one. Refunds go to the original payment method once the sauna is received, inspected and restocked, with no stated timeframe. Sunlighten reserves the right to refuse a return, exchange or cancellation.

More about this assessment

Sunlighten Amplify II is a two-person infrared sauna in the Black Edition: a black Obsidian exterior with natural eucalyptus inside. It has five SoloCarbon far-infrared heaters and three halogen full-spectrum heaters, with no red light. It's rated at 1,880 W on 120 V household power. It needs its own 20 A circuit with a NEMA 5-20R outlet, and Sunlighten doesn't price the electrical work. The sale price was $5,999 (regular $6,899), with free freight to your garage or driveway. The cabinet and heaters get 7 years of home-use warranty, but labor isn't covered and opened saunas can't be returned.

Strengths on paper

Eight heaters: five SoloCarbon far-infrared and three halogen full-spectrum
Runs on 120 V household power, not 240 V
Price and stock are on the page, with free freight in the contiguous US and arrival in 12 to 14 days
Magne-Seal panels lock together without screws or nails, in about 2 to 3 hours with two people
Sunlighten publishes the inside, bench and door measurements and says it fits under an 8 ft ceiling
7 years of home-use warranty on the cabinet and heaters

Limitations

Needs its own 120 V, 20 A circuit, and Sunlighten doesn't price the electrical work
Opened saunas can't be returned
Unopened returns can cost a $499 restocking fee, a 3% administrative fee, storage fees and return shipping
Freight stops at the garage or driveway on a pallet, so you carry two to three 130 lb boxes inside
The magnets in the Magne-Seal panels can interfere with pacemakers, per Sunlighten
No heater wattages, top temperature or measured EMF values on the product page
The warranty doesn't cover labor, you pay freight on parts, and the controls get only 3 years
The ETL certification mentioned in the FAQ comes with no listing number or model scope

What it costs to own.

Adjust the assumptions for your use. Missing costs stay unknown.

PLAN YOUR OWNERSHIP COSTS

What will it cost to own?

Change the assumptions to fit your use. Leave an unknown cost blank. Add water, subscriptions, cleaning, shipping and taxes if they apply. Use average operating power, not the maximum rating.

Purchase price ($)Installation / accessories ($)Annual consumables ($)Average operating power (W)Hours per dayAnnual other costs ($)Electricity ($/kWh)Years

3-year known subtotal

$5,999.00

Incomplete: installation, energy use. This is not the full ownership cost.

Energy component: Unknown

Purchase + installation + years × (annual consumables + annual other) + watts/1000 × hours/day × 365 × years × $/kWh. Annualized allowances, not an exact replacement schedule. Excludes taxes, shipping, finance and resale unless entered.

Replacement parts & cost assumptions

No scheduled consumable is listed. That does not mean zero maintenance or repair costs.

Purchase is the $5,999 sale price on Sunlighten's online store on Oct 13, 2026. At the $6,899 regular price, it would be $900 more. Freight shipping was advertised as free in the contiguous US.
Installation cost is unknown. You assemble it yourself, two people for about 2 to 3 hours. If there's no dedicated 120 V, 20 A circuit where it will go, Sunlighten tells you to book an electrician, but it doesn't price that work.
No filter, lamp or other recurring part is listed on the product page, so annual consumables are $0. That doesn't mean zero cost for electricity, cleaning or repairs, and warranty labor is yours.
The 1,880 W figure is the rated draw, not a measured average, so yearly energy isn't estimated. Sunlighten suggests building up to 40-minute daily sessions after a 45- to 60-minute preheat. At the full rating, a 45-minute preheat plus a 40-minute session would use about 2.7 kWh. That's a ceiling, since the heaters cycle once the cabin is hot.
No subscription or app fee is mentioned, so other yearly costs are $0.

Evidence & sources.

Are saunas good for you? Our evidence review grades the research as Moderate. That grade is about the claim, not about this product.

Manufacturer claimHeater layout, electrical rating, measurements, weight, delivery and assembly details come from Sunlighten's product page.¹ These figures come from the maker and weren't measured independently. The owner's manual, spec sheet and assembly guide on Sunlighten's support page couldn't be opened on Oct 13, 2026.
Manufacturer claimSunlighten describes a "low EMF design" for its heaters.¹ The product page gives no EMF or ELF figure, test method, measuring distance or third-party report.
Manufacturer claimThe product page FAQ mentions ETL certification in general terms.¹ It names no listing file number and doesn't say which models are covered. No certifier directory was checked. Ask Sunlighten for the listing before you buy.
Manufacturer claimSunlighten markets support for detoxification, cardiovascular conditioning and muscle recovery. Its FAQ says SoloCarbon is "clinically shown" to lower blood pressure.^{1, 4} These are the seller's marketing claims, not measurements of this cabin. This review didn't assess the studies behind them. Sunlighten's support page calls its products general wellness products, not medical devices, and says they aren't intended to treat, cure or prevent disease.
Manufacturer claimSunlighten's contraindications page says people with obesity, heart disease, high or low blood pressure, circulatory problems or diabetes should consult a physician before use. It warns that the magnets used to assemble its saunas can interrupt pacemakers.⁵ It also says pregnant women and people on prescription drugs should check with a physician. Alcohol, drugs or medications before a session may lead to unconsciousness. For older adults and children it advises a lower temperature and no more than 15 minutes at a time. These are precautions, not evidence of a benefit.
Manufacturer claimSunlighten suggests beginners start with 10 to 15 minute sessions at 100°F every other day and build toward 40-minute daily sessions.¹ That's a usage suggestion, not evidence of a benefit. It's the basis for the energy figure in the ownership notes.