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Installed infrared cabin

Sunlighten mPulse Aspire

1-person installed infrared cabin with red light, eucalyptus or basswood

Price on requestNo published price, checked Oct 20, 2026

One-person infrared cabin with red light that needs its own 20 A circuit

Get a quote at Sunlighten Full review →

Installed infrared cabin

Sunlighten Amplify III

3-person installed infrared cabin, eucalyptus/obsidian

$6,999US price, checked Oct 23, 2026

Three-person cabin with ten heaters, but its voltage is unclear

Check price at Sunlighten Full review →

Criterion	Sunlighten mPulse Aspire	Sunlighten Amplify III
US price	Price on requestChecked Oct 20, 2026 · Price details in the review	$6,999Checked Oct 23, 2026 · Price details in the review
Three-year ownership estimate	$319.30 Incomplete known subtotal. Electricity assumption: $0.18/kWh. Not included: purchase price, installation, other annual costs.	$6,999 Incomplete known subtotal. Not included: installation, other annual costs, energy use.
Choose if	One person with a dedicated 120 V, 20 A circuit who wants red light and several infrared wavelengths in one cabin.	Two or three people who share sessions, with a dedicated 20 A circuit and about 63 × 46 in of indoor floor.
Main trade-off	Sunlighten publishes no price, and you can't return the cabin once the boxes are opened.	Sunlighten's product page and spec sheet disagree on voltage, and opened saunas can't be returned.
Key specifications	Heaters: 5 far-infrared, 4 mid-infrared and 3 near-infrared and red LED panels. Sunlighten says its PulseIQ platform controls the four wavelengths separately. Per-heater wattage isn't stated Red and near-infrared light: Sunlighten says the LED panels peak at 650 nm (red) and 880 nm (near-infrared) and deliver 1 to 3 mW/cm² to the skin. It says that's lower than dedicated LED devices. No independent measurement is given Electrical: 120 V, 18 A, 2,160 W per the assembly guide. Dedicated 120 V, 20 A circuit with a NEMA 5-20 outlet. 10 ft cord. Dual-band Wi-Fi (2.4 and 5 GHz) Inside and seating: 37.8 W × 35.6 D × 71.5 H in. One bench, 37.8 W × 21.7 D in and 20.2 in off the floor, for one person Outside and weight: 43.6 W × 41.6 D × 79 H in with feet. 463 lb in eucalyptus, 432 lb in basswood. Leave 4 in to the walls and 6 in above Heat: Sunlighten says it warms about 1°F a minute and suggests 45 to 60 minutes of preheat. Its wellness programs aim for 120 to 130°F, and you can preheat to 130 to 140°F by hand. No top temperature is stated Controls: Built-in tablet and Sunlighten app to start, preheat (up to 60 minutes), schedule and adjust sessions. Six preset programs plus a custom one. Screen size isn't stated Delivery and assembly: Freight to a garage or flat, paved driveway, left on a pallet. Two cartons, 46 × 7 × 48 in and 47 × 17 × 76 in. Two people assemble it, about 1 to 2 hours per Sunlighten's FAQ Safety listing: Sunlighten says its saunas are ETL-certified. The spec sheet shows an ETL mark (US and Canada) beside RoHS, CE and TÜV logos, with no file number Running cost: Sunlighten's owner's manual estimates $0.20 to $0.50 an hour. The 2,160 W figure is the electrical rating, and Sunlighten gives no average power draw Extras: Chromotherapy lights with a remote, ceiling speakers, CELLIANT heater covers and a ceiling vent Cleaning: Wipe the bench and floor after each use, wipe all wood weekly with Sunlighten's natural cleaner and wipe heater surfaces monthly. Clear dust from the power box heat sinks twice a year	Heaters: 7 SoloCarbon far-infrared heaters and 3 full-spectrum heaters. Wattage of each isn't stated Electrical: Dedicated 20 A circuit and outlet. The product page says 120 V and gives no wattage. The spec sheet and manual say 240 V, 3,280 W, 13.67 A and a NEMA 6-20 outlet. Get Sunlighten's answer in writing Top temperature and clearance: Up to 170°F. Sunlighten recommends 4 in at the walls and 12 in above, and the manual says at least 8 in behind Inside and seating: 56.8 W × 39.9 D × 70.3 H in. One bench, 56.7 W × 20.3 D in and 19.5 in high, for up to three people Weight: 642 lb on the product page. The spec sheet says 710 lb in eucalyptus and 668 lb in basswood Delivery and assembly: Freight to a flat, paved surface at your garage door, left on a pallet. Two people assemble it in about 2 to 3 hours Running cost: Sunlighten's owner's manual estimates $0.20 to $0.50 an hour Heat-up: Sunlighten's product page suggests preheating for 45 to 60 minutes and says it warms about one degree per minute. The manual says 30 to 45 minutes Options: Eucalyptus or Obsidian at the same price, basswood $200 less. The 2-person size costs $1,000 less. Integrated red light was marked not available Extras: Bluetooth sound system, chromotherapy lights and a CELLIANT heater cover
Exact variant	1-person installed infrared cabin with red light, eucalyptus or basswood	3-person installed infrared cabin, eucalyptus/obsidian
Dimensions	Outside: 43.6 W × 41.6 D × 79 H in, including 2 in feet. Inside: 37.8 W × 35.6 D × 71.5 H in. The bench is 37.8 in wide and 21.7 in deep, 20.2 in off the floor. It weighs 463 lb in eucalyptus and 432 lb in basswood. Sunlighten recommends 4 in to the walls and 6 in above the cabin. Sunlighten gives no minimum doorway width and asks you to measure doorways and hallways before you buy.	Outside: 62.3 W × 45.9 D × 77.7 H in, including 2 in feet. Inside: 56.8 W × 39.9 D × 70.3 H in. The door opening is 28 in. Sunlighten says the cabin fits under a standard 8 ft ceiling and its panels fit through a standard 30 in doorway.
Installation	It needs a dedicated 120 V, 20 A circuit and outlet with a NEMA 5-20 plug. Sunlighten's assembly guide rates it at 120 V, 18 A and 2,160 W. The 10 ft cord exits at the back left of the floor and must plug straight into the wall. The assembly guide says to add a GFCI or dual-function breaker only if your local code requires one. The spec sheet says dual-band Wi-Fi (2.4 and 5 GHz) is required, while the product page says recommended. Freight goes to a garage or a flat, paved driveway, where the carrier leaves it on a pallet and can't carry it up steps. You need two people to unpack and assemble it, which Sunlighten's FAQ puts at 1 to 2 hours, and professional installation isn't required.	It needs a dedicated 20 A circuit and outlet. The product page says 120 V. The spec sheet and owner's manual say 240 V, 3,280 W, 13.67 A and a NEMA 6-20 outlet (see the Electrical row). The manual recommends a GFCI or dual-function breaker, so check your local code. Freight delivery needs a flat, paved surface up to your garage door, and the carrier leaves the sauna there on a pallet and can't carry it up steps. It comes in two to three mattress-sized boxes of 130 lb each. The Magne-Seal panels lock together without screws or nails, and Sunlighten says two people take about 2 to 3 hours.
Materials	Sunlighten says each sauna is built from sustainably sourced eucalyptus with natural variation in tone and grain. Its spec sheet also lists basswood. It lists kiln-dried wood, thick insulation, a glass front door and side glass, and CELLIANT fabric covers over the heaters on the interior walls. Its safety page calls the glue non-toxic, citing testing by Franklin International.	It's eucalyptus in Sunlighten's black Obsidian finish. Plain eucalyptus costs the same, and basswood is $200 less. It comes with a CELLIANT heater cover. Sunlighten says its eucalyptus is sustainably sourced. It also says the glue on the tongue-and-groove boards is non-toxic and was third-party tested by Franklin International.
Warranty	Sunlighten's warranty page gives the cabinetry and heaters 7 years for home use, and one set of terms covers its mPulse, Signature and Amplify cabins. Coverage is for replacement parts only, with no labor or technician costs. You pay freight on parts shipped for service, and the page excludes costs or freight for parts shipped more than 90 days after delivery. Controls (tablet, control pad and power box) get 3 years, the glass door and audio get 1 year. Chromotherapy and the Blaupunkt sound system carry a separate 1-year manufacturer's warranty. Commercial use gets 5 years on the cabinetry and heaters and 1 year on controls, glass and audio. It covers only the original buyer and ends if you transfer ownership, and the sauna must be bought and put into use within a year of its manufacture date. It's void if the sauna is altered, misused or exposed to water. It's also void on a power strip, extension cord, converter or non-dedicated circuit. The same goes for a spot within 5 ft of a shower, tub or cold plunge, or a repair attempted without consulting Sunlighten. Sunlighten says its saunas aren't designed for outdoor use, and outdoors the separately sold cover must stay on at all times, even during sessions. The page doesn't say whether the red and near-infrared LED panels count as heaters.	Sunlighten's warranty covers replacement parts only, not labor or technician costs, and you pay all freight, including on parts shipped for service. For home use, the cabinet and heaters get 7 years, the controls 3 years, and the glass door and audio 1 year. Commercial use gets 5 years on the cabinet and heaters and 1 year on everything else. Coverage is for the original buyer only and ends if you sell the sauna, and the sauna must be bought and put into use within a year of its manufacture date. It's void on a power strip, extension cord, converter or shared circuit, or within 5 ft of a shower, bathtub or cold plunge. Sunlighten says its saunas aren't designed for outdoor use, and outdoors its cover (sold separately) has to stay on at all times, even during sessions.
Returns	You have 30 days from delivery to return it, but only while it's unopened in its original packaging. Opened saunas can't be returned or exchanged. Fees can include a 3% administrative fee and a $499 restocking fee for each mPulse sauna. They can also include storage fees, return shipping to the warehouse and shipping back to you on an exchange. To cancel before it ships, email your sales representative, and the same fees may apply. To return it, email your sales representative for an authorization, or Sunlighten's logistics team if you have none. Sunlighten then schedules the pickup and refunds your original payment method after it inspects and restocks the sauna. Sunlighten reserves the right to refuse a return, exchange or cancellation.	You have 30 days from delivery to start a return, but only while the sauna is unopened in its original packaging. Opened saunas can't be returned or exchanged. Charges can include a 3% administrative fee, a $499 restocking fee, storage fees and return shipping to the warehouse. Cancelling before it ships can cost the 3% fee, plus storage fees if the sauna has to be re-routed. Sunlighten reserves the right to refuse a return, exchange or cancellation. It refunds to your original payment method after it inspects and restocks the sauna.
Unresolved questions	The price, and which models the Sale ends 10/31/26 footnote covers A ship date or lead time for the Aspire, since the shipping page says the estimated ship date varies by model Whether any EMF measurement covers the Aspire, since the Vitatech report tested other models and the safety page's 0.5 mG figure gives no model or distance The ETL file number and which models it covers A top cabin temperature Average power draw once the cabin is up to temperature The minimum doorway width its panels and cartons need Whether the 7-year heater warranty covers the red and near-infrared LED panels Whether your local code requires GFCI protection, and what an electrician would charge The tablet's screen size, and whether there's an automatic shut-off Whether the sauna works without Wi-Fi, since the spec sheet lists dual-band Wi-Fi as required and Sunlighten doesn't say	Which voltage is right, 120 V (product page) or 240 V (spec sheet and owner's manual) Whether the weight is 642 lb (product page) or 710 lb (spec sheet) The wattage of each heater and average power use during a session Whether an ETL listing covers this exact model, and its file number Whether the sale price continues after October 31, when Sunlighten's pages say the sauna sale ends

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.