SIDE BY SIDE
See prices, running costs, specifications and trade-offs side by side. Choose two to four products of the same type.
Our one-person cabin pick
1-person installed far-infrared cabin, eucalyptus
$4,999US price, checkedOne-person far-infrared cabin that needs its own 120 V, 20 A circuit
Check price at Sunlighten for Sunlighten Signature I Full review →
Installed infrared cabin
2-person full-spectrum infrared cabin, mahogany (basswood also offered), 120V / 20A plug-in
Price on requestNo published price, checkedTwo-person full-spectrum cabin with a lifetime warranty, sold by quote
Check price at Clearlight for Clearlight Sanctuary 2 Full review →| Criterion | Sunlighten Signature I | Clearlight Sanctuary 2 |
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| US price | $4,999Checked Oct 13, 2026 · Price details in the review | Price on requestChecked Oct 13, 2026 · Price details in the review |
| Three-year ownership estimate | $5,371.52 Incomplete known subtotal. Electricity assumption: $0.18/kWh. Not included: installation. | Not enough data Incomplete known subtotal. Not included: purchase price, installation, other annual costs, energy use. |
| Choose if | One person with a dedicated 120 V, 20 A circuit and about 38 × 40 in of indoor floor. | Two adults with a 20 A outlet and about 60 × 56 in of floor space who'd rather have long warranty coverage than a published price. |
| Main trade-off | You can't return it once the boxes are opened, and the warranty doesn't pay for labor. | You can't compare its cost upfront with listed-price cabins like the Sunlighten Amplify II, labor coverage ends after 7 years indoors, and a return costs 25% plus freight and the original shipping charge. |
| Key specifications |
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| Exact variant | 1-person installed far-infrared cabin, eucalyptus | 2-person full-spectrum infrared cabin, mahogany (basswood also offered), 120V / 20A plug-in |
| Dimensions | Outside: 37.8 W × 39.8 D × 77.7 H in, including 2 in feet. Inside: 32.2 W × 33.6 D × 70.3 H in. The door opening is 28 in, and the door swings outward to the right. The bench is 32.1 in wide and 20.2 in deep, 19.5 in off the floor. It weighs 428 lb. Sunlighten recommends 4 in of clearance from the walls and 12 in above the cabin. It says the cabin fits under a standard 8 ft ceiling and its panels fit through a standard 30 in doorway. | Outside: 51.75 W × 47.75 D × 77 H in (listed as 51 3/4″ × 47 3/4″ × 77″). Inside: 46.5 W × 44.25 D × 72.5 H in. It weighs 450 lb. The owner's manual asks for at least 4 in of clearance on all sides for air circulation. The product page recommends 4 in around the sauna if it's built into an enclosed space. |
| Installation | It needs a dedicated 120 V, 20 A circuit and outlet. The outlet is a NEMA 5-20R, and the plug is a NEMA 5-20P. Sunlighten's FAQ says a power strip or converter voids the warranty. The warranty page also rules out extension cords and non-dedicated circuits. The same page requires at least 5 ft between the sauna and a cold plunge, shower or bathtub. The product page doesn't say whether you need an electrician or GFCI protection. It points you to the spec sheet for electrical details. Sunlighten's support page links an owner's manual, spec sheet, assembly guide and power box installation guide. Those PDFs couldn't be opened for this review. Freight delivery goes to a garage or flat, paved driveway. 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, and you need at least two people to unpack and carry in the panels. The Magne-Seal panels lock together without screws or nails. Sunlighten says two people take about 2 to 3 hours. | It plugs straight into a 120 V, 20 A wall receptacle with a NEMA 5-20P plug. It's rated at 18.83 A, close to the circuit's 20 A rating. Clearlight doesn't say you need a dedicated circuit or an electrician. The manual calls for a properly grounded 3-wire socket and advises against extension cords. It strongly recommends a GFCI in potentially wet locations, and asks for a dry, level surface with at least 4 in of clearance. The sauna ships by liftgate freight, with a scheduled delivery appointment. Clearlight's general assembly page says two people usually assemble it in about 1 to 1.5 hours, using a screwdriver and the included Allen wrench. Installation service is available in some areas, at no stated price. Outdoors, Clearlight requires its optional canvas cover, with the sauna on a deck or concrete pavers. |
| Materials | Eucalyptus, which Sunlighten says is sustainably sourced, with natural variation in tone and grain. Basswood was marked not available, and the Obsidian finish is sold on a separate page. It comes with a CELLIANT heater cover. Sunlighten says the glue is non-toxic, citing third-party testing by Franklin International. | Mahogany or basswood, which Clearlight describes as genuine, furniture-grade natural wood. It says the heaters combine ceramic and carbon. |
| Warranty | Sunlighten's warranty page covers its mPulse, Signature and Amplify cabins under one set of terms. For home use, the cabinet and heaters get 7 years. The cabinet includes the bench, 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 has a separate 1-year warranty. Commercial use gets 5 years on the cabinet and heaters and 1 year on everything else. It covers replacement parts only, not labor or technician costs. You pay the freight on parts shipped for service. It covers only the original buyer and ends if you sell the sauna. It's void on a power strip, extension cord, converter or non-dedicated circuit. It's also void within 5 ft of a shower, tub or cold plunge. Sunlighten's contraindications page adds that repairs attempted without consulting Sunlighten void it. Sunlighten says its saunas aren't designed for outdoor use. Outside, the separately sold sauna cover has to stay on at all times, even during sessions. The sauna must also be bought and put into use within a year of its manufacture date. The page shows no version or effective date. | Clearlight says its lifetime residential warranty covers the entire sauna for as long as you own it: the wood cabin, True Wave heaters, controls and electrical components, audio and chromotherapy lighting. Parts and shipping are covered for life. Labor is covered only for an initial period. The "Sauna Works Limited Lifetime Warranty" table in the owner's manual sets that at 7 years for indoor residential use (USA and Canada only). Outdoor residential use is covered only if you bought Clearlight's water-resistant cover with the sauna and kept it on. In that case, the manual limits cabin and labor coverage to 5 years. Commercial use carries a 5-year warranty. Clearlight's warranty page and manual differ on registration. The warranty page says it's automatic when the sauna ships. The manual says you must register within 30 days of purchase. The manual also says the warranty can't be transferred without Clearlight's written consent. |
| Returns | You can return or exchange it within 30 days of delivery, but only in the original, unopened packaging. Opened saunas can't be returned. Charges can include a 3% administrative fee, a $499 restocking fee for Signature saunas, storage fees and return shipping. You can cancel before it ships, but the same fees can apply. You start a return by emailing your sales rep or customer care for an authorization, and Sunlighten schedules the pickup. It refunds to your original payment method after it inspects and restocks the sauna. Sunlighten reserves the right to refuse a return, exchange or cancellation. | Clearlight calls it a "30 Day Risk-Free Return Policy", but returns aren't free. They're accepted within 30 business days of receipt, and you need a Return Merchandise Authorization. The sauna has to be in new or like-new condition, in undamaged original packaging with all manuals. The refund is the purchase price minus any original shipping charges and a 25% restocking charge. If the sauna shipped under a free or discounted shipping promotion, the actual original freight cost is deducted. You pay return shipping. Custom, private-label and non-standard models are non-refundable. You must open the boxes and inspect them for concealed damage within 5 business days of delivery. |
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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.