Sunlighten Signature I 1-Person Far Infrared Sauna

Infrared

Where to buy

Sunlighten prices by quote.

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Specifications verified October 9, 2026. How these numbers are checked.

Footprint: 37.8 x 39.8 x 77.7 in
Placement: Indoor
Plug-in or 240 V: Plugs into a 120 V outlet; no 240 V wiring needed.
Circuit: 120V / 20A (NEMA 5-20P), as the maker publishes it.Sunlighten publishes a dedicated 120V 20 amp circuit for this model. Its stated 1,350 W rating computes to 11.3 amps of draw and a 15 amp minimum breaker under the 125 percent rule; the maker specifies 20 amps, one size above that minimum.Check it on the calculator.

Running cost: About $0.25 per one-hour session: a 1.35 kW heater at the US average residential rate of 18.16 cents per kWh (EIA, August 2026).

Full specifications: capacity, heater power, warranty and 1 more, each with its source

Specifications read from the maker's product page on October 9, 2026: sunlighten.com. A row with its own source link was read from the page it links.

Source links to Sunlighten are affiliate links that support this site; see the affiliate disclosure.

How it measures against similar models: 2 trade-offs

Heater power of 1.35 kW is lower than 97 percent of the 259 models that list one (median: 6 kW).
Ties for the lowest capacity of the 400 models that list one.

These are measurements against the rest of the database, not a verdict. Nothing else about this model reads as unusual for its class.

Compare it with all 30 1 person saunas, or see infrared sauna picks by need, each pick chosen by a stated rule.

The 4 categories it is listed in

This model is listed in these categories:

Nearest to this model on capacity and type.