SIDE BY SIDE
See prices, running costs, specifications and trade-offs side by side. Choose two to four products of the same type.
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 →
Installed infrared cabin
3-person installed infrared cabin, eucalyptus/obsidian
$6,999US price, checkedThree-person cabin with ten heaters on a dedicated 120 V circuit
Check price at Sunlighten for Sunlighten Amplify III Full review →| Criterion | Clearlight Sanctuary 2 | Sunlighten Amplify III |
|---|---|---|
| US price | Price on requestChecked Oct 13, 2026 · Price details in the review | $6,999Checked Oct 13, 2026 · Price details in the review |
| Three-year ownership estimate | Not enough data Incomplete known subtotal. Not included: purchase price, installation, other annual costs, energy use. | $6,999 Incomplete known subtotal. Not included: installation, energy use. |
| Choose if | 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. | Two or three people who share sessions, with a dedicated 120 V, 20 A circuit and about 63 × 46 in of indoor floor. |
| Main trade-off | 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. | Opened saunas can't be returned, and the product page skips wattage, top temperature and a safety listing number. |
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| Exact variant | 2-person full-spectrum infrared cabin, mahogany (basswood also offered), 120V / 20A plug-in | 3-person installed infrared cabin, eucalyptus/obsidian |
| Dimensions | 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. | 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 bench is 56.7 in wide and 20.3 in deep, 19.5 in off the floor. It weighs 642 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. |
| Installation | 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. | It needs a dedicated 120 V, 20 A circuit and outlet. Sunlighten's FAQ says a power strip or converter voids the warranty. The warranty page also rules out extension cords and shared circuits. It asks for at least 5 ft between the sauna and a cold plunge, shower or bathtub. The product page suggests booking an electrician so the outlet is ready on build day. It doesn't list the wattage, amperage or outlet type. Freight delivery needs a flat, paved surface up to your garage door. 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. Sunlighten says two people take about 2 to 3 hours. |
| Materials | Mahogany or basswood, which Clearlight describes as genuine, furniture-grade natural wood. It says the heaters combine ceramic and carbon. | 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 | 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. | Sunlighten's warranty page groups Amplify with its other cabin saunas. 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. You pay the freight on parts shipped for service. A general disclaimer says coverage is for replacement parts only, not labor or technician costs. It sits right after the red light panel's terms, so it's unclear whether it applies to cabins. The warranty covers only the original buyer and ends if you sell the sauna. It's void on a power strip, extension cord, converter or shared circuit, or within 5 ft of water. Sunlighten says its saunas aren't designed to be placed outdoors. If you put one outside anyway, its cover (sold separately) 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. |
| Returns | 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. | Non-custom saunas like Amplify can be returned or exchanged within 30 days of delivery, but only in the original, unopened 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. |
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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.