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Installed infrared cabin

Sunlighten Amplify II

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

$5,999US price, checked Oct 13, 2026

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

Check price at Sunlighten Full review →

Installed infrared cabin

Clearlight Sanctuary 1

1-person indoor full-spectrum infrared cabin, mahogany (basswood also offered), 120V/15A plug-in

Price on requestNo published price, checked Oct 13, 2026

One-person full-spectrum cabin that plugs into a standard 120V outlet

Check price at Clearlight Full review →

Criterion	Sunlighten Amplify II	Clearlight Sanctuary 1
US price	$5,999Checked Oct 13, 2026 · Price details in the review	Price on requestChecked Oct 13, 2026 · Price details in the review
Three-year ownership estimate	$5,999 Incomplete known subtotal. Not included: installation, energy use.	Not enough data Incomplete known subtotal. Not included: purchase price, installation, other annual costs, energy use.
Choose if	Two people with a dedicated 120 V, 20 A circuit, about 51 × 46 in of indoor floor and a paved path for freight.	A solo user with about 42.5 × 48.25 in of floor space who wants full-spectrum heaters running off a standard 120V, 15A outlet.
Main trade-off	Opened saunas can't be returned, warranty labor is on you, and the panel magnets can affect pacemakers.	There's no published price, labor is covered for 7 years rather than for life, and the 14.6A draw leaves little headroom on a 15A circuit.
Key specifications	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	Heaters: Two 500 W True Wave full-spectrum heaters on the front wall. True Wave far-infrared heaters on the back wall, side walls, behind the calves and under the floor (count and wattage not stated) Electrical: 120 V, 1,740 W, 14.6 A. Plugs into a 120 V, 15 A outlet with a NEMA 5-15P plug Capacity: Built for 1 adult Weight: 425 lb Operating temperature: 115–125°F, per Clearlight's FAQ, which says cabins typically reach that range even when set to 150°F. Another FAQ answer says 115–130°F. Neither figure is given for this cabin specifically Controls and extras: Digital keypad (temperature, time, lights, heater intensity, reservation mode), smartphone control, Bluetooth/AUX audio and charging station, 12-color chromotherapy. Red light therapy upgrade available EMF: Marketed as low EMF/ELF. The product page says the heaters "cancel out both EMF and ELF." Clearlight's FAQ says True Wave heaters measure less than 1 mG when tested directly on the heater. No test standard, lab or report is named.
Exact variant	2-person installed infrared cabin, black Obsidian exterior with eucalyptus interior, no red-light option	1-person indoor full-spectrum infrared cabin, mahogany (basswood also offered), 120V/15A plug-in
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.	Exterior 42.5 W × 48.25 D × 77 H in. Interior 37.5 W × 45.5 D × 72.5 H in. Bench 35.5 W × 21.75 D × 19 H in. It weighs 425 lb. If you build it into an enclosed space, Clearlight recommends leaving 4 in around the sauna.
Installation	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.	It plugs into a standard 120 V, 15 A household outlet with a NEMA 5-15P plug. The product page doesn't say it needs a dedicated circuit. Shipping is advertised as free. The sauna arrives by freight with lift-gate service at a scheduled delivery appointment, and someone 18 or older must sign for it. Clearlight says two people usually assemble it in about 1 to 1.5 hours with a screwdriver and the included Allen wrench. Its FAQ says 1 to 3 hours. Clearlight offers installation service in some areas but doesn't state a price.
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.	Mahogany or basswood. Clearlight calls it furniture-grade natural wood and notes that grain and color vary from cabin to cabin.
Warranty	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.	Clearlight says its residential Limited Lifetime Warranty covers the entire sauna for as long as you own it. That means the heaters, control panels and electrical components, wood cabin, audio and chromotherapy lighting. Parts and shipping are covered for life, but labor isn't. The warranty page says labor is covered for an initial period without giving its length. The Sanctuary owner's manual, which lists Sanctuary 1, sets labor at 7 years for indoor home use in the US and Canada. The manual counts coverage from the purchase date. It also says the warranty can't be transferred without written consent from Sauna Works, which issues it. Commercial use falls under a 5-year warranty. The warranty page says registration is automatic when the sauna ships. The manual instead asks you to register within 30 days of purchase.
Returns	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.	Clearlight calls it a "30 Day Risk-Free Return Policy," but a return isn't free. You have 30 business days from receipt and need a return authorization (RMA). The sauna must be in new or like-new condition, with undamaged original packaging and all manuals. Clearlight deducts a 25% restocking charge and the original shipping charges. If the sauna shipped under a free or discounted shipping promotion, that means the actual freight cost. You also pay return shipping. Custom, private-label and non-standard models are non-refundable. Orders canceled before shipment are fully refunded. Concealed damage must be reported within 5 business days of delivery.
Unresolved questions	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 current quoted price, and whether the Save $600 promotion applies Whether the owner's manual or spec sheet recommends a dedicated circuit (the linked spec sheet couldn't be opened) Whether the red light therapy upgrade needs a bigger circuit. Clearlight's FAQ says add-ons may require a circuit upgrade, typically from 15 A to 20 A or from 20 A to 30 A, but doesn't name models Whether the manual's 7-year labor term is current, since the warranty page gives no length Number and wattage of the far-infrared heaters Which models and components the claimed ETL and CE certification covers Delivery timeline

These comparisons use published specifications, not head-to-head tests. Prices and terms are dated. Unknown costs are not zero. Check the exact variant before you buy.