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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 RED III

3-person infrared cabin with integrated red-light configuration

$8,599US price, checked Oct 23, 2026

Three-person cabin with built-in red light that needs a 240 V circuit

Check price at Sunlighten Full review →

Criterion	Sunlighten mPulse Aspire	Sunlighten Amplify RED III
US price	Price on requestChecked Oct 20, 2026 · Price details in the review	$8,599Checked 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.	$8,599 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 want red light built into their sauna and can add a dedicated 240 V, 20 A circuit.
Main trade-off	Sunlighten publishes no price, and you can't return the cabin once the boxes are opened.	You pay $1,600 extra for red light with no published wavelength or dose, 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: 10 heaters (7 far-infrared and 3 full-spectrum) plus 5 near-infrared and red LED panels. The red light's wavelength and output aren't stated Electrical: 240 V, 3,465 W and 14.44 A, on a dedicated 20 A circuit with a NEMA 6-20R outlet Inside and bench: 56.8 W × 39.9 D × 70.3 H in inside. The bench is 56.6 W × 20.2 D in and 19.5 in off the floor Top temperature: Up to 170°F, which Sunlighten qualifies with "in ideal conditions" Heat-up: Sunlighten suggests preheating for 45 to 60 minutes. It says the cabin warms about one degree per minute, depending on room temperature Weight and delivery: 710 lb in two to three boxes on a pallet, left in your garage or driveway. 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 Extras: Chromotherapy lighting and a sound system Options: The 2-person Amplify RED II costs $900 less and the 4-person Amplify RED IV $1,700 more. Without red light, the same-size Amplify III Eucalyptus is $1,600 less
Exact variant	1-person installed infrared cabin with red light, eucalyptus or basswood	3-person infrared cabin with integrated red-light configuration
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. The spec sheet recommends 4 in between the sauna and the walls and 12 in above it. The manual also says to leave at least 8 in behind it so the electronics can cool. 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 240 V, 20 A circuit and a NEMA 6-20R outlet for its 6-20P plug. Sunlighten tells you to book your electrician early so the outlet is ready on build day. The manual recommends a GFCI or dual-function breaker, so check your local code. If only 208 V is available, the spec sheet says you need a buck-boost transformer. Freight arrives in two to three large boxes on a pallet, left in your garage or on a flat, paved driveway spot, and the carrier calls first to schedule. The panels lock together with Magne-Seal corners, without screws or nails. 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.	Eucalyptus tongue-and-groove boards on solid wood framing, which Sunlighten calls sustainably sourced and non-toxic. Basswood and Obsidian finishes were marked not available for this model. Sunlighten's page calls the wood both eucalyptus and basswood. Sunlighten says the glue on its boards 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. Sunlighten doesn't say whether the red-light panels count as heaters for the 7-year term. 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 non-dedicated circuit, or within 5 ft of water. Sunlighten says its saunas aren't designed for outdoor use, and outdoors the plastic sheet of the sauna cover (sold separately) must 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. Fees can include a 3% administrative fee, storage fees and return shipping. Sunlighten's policy lists a $499 restocking fee for each Amplify sauna, and the RED III is sold as an Amplify, so the fee applies to it. Cancelling before it ships can cost the 3% fee, plus storage fees if it has to be rerouted.
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	The red-light panels' wavelength and irradiance, and whether they run at the same time as the far-infrared heaters Average power use during a session, and so the yearly running cost Whether an ETL listing covers this exact model, and its file number Whether it's in stock, since the product page and Sunlighten's store listing disagreed The lifespan and replacement price of the full-spectrum heaters and red LED panels 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.