Sunlighten Signature II

Sunlighten builds the Signature II around its patented SoloCarbon heater coating, with nine far-infrared panels surrounding a cabin that seats two on a 45.2-inch bench. The published spec sheet is unusually precise: 50.9" W x 45.9" D x 77.7" H exterior, 45.4" x 39.9" x 70.3" interior, 522 lbs in eucalyptus (438 lbs in basswood), and a 2,006W draw on a dedicated 120V 20A circuit with a NEMA 5-20R outlet. Chromotherapy lighting and a Blaupunkt Bluetooth sound system are standard, and the Magne-seal locking system holds panels together without screws.

What Sunlighten does not publish matters too: there is no listed price (the figure here is an approximate market price for the base configuration), no maximum temperature, and no warm-up time — far-infrared cabins generally run cooler than full-spectrum or traditional saunas, but the company does not state a number for this model. The residential warranty is solid on the core (7 years on cabinetry and heaters) but drops to 3 years on controls and 1 year on the glass door and audio. For buyers who want a straightforward, plug-in-adjacent far-infrared cabin from an established brand and don't mind the quote process, this is the entry point to Sunlighten's lineup.