# Sunlighten Signature I

> Sunlighten Signature I is a sauna from Sunlighten infrared saunas. It uses infrared heat, seats one person, and measures 39.8 × 37.8 × 77.7 in outside (L × W × H). List price: $5,499 (Sunlighten's published price, checked Oct 7, 2026).

- Line: [Sunlighten infrared saunas](https://saunagrid.com/lines/sunlighten-infrared/)
- Category: [Saunas](https://saunagrid.com/compare/sauna/)
- Status: current
- Data confidence: inferred (last verified 2026-10-10; [what this means](https://saunagrid.com/how-we-compare/#confidence))
- Page: https://saunagrid.com/products/sunlighten-infrared-signature-i/

## Specifications

| Spec | Value | Source |
|---|---|---|
| Model / SKU | not published |  |
| Heat | infrared | [sunlighten.com](https://www.sunlighten.com/saunas/signature-infrared-saunas/signature-i/) (brand, page, 2026-10-07) |
| Infrared spectrum | far | [sunlighten.com](https://www.sunlighten.com/saunas/signature-infrared-saunas/signature-i/) (brand, page, 2026-10-07) |
| Setting | not published |  |
| Shape | not published |  |
| Seats | 1 | [sunlighten.com](https://www.sunlighten.com/saunas/signature-infrared-saunas/signature-i/) (brand, page, 2026-10-10) |
| Outside size (L×W×H) | 39.8 × 37.8 × 77.7 in | [sunlighten.com](https://www.sunlighten.com/saunas/signature-infrared-saunas/signature-i/) (brand, page, 2026-10-10) |
| Inside size (L×W×H) | 33.6 × 32.2 × 70.3 in | [sunlighten.com](https://www.sunlighten.com/saunas/signature-infrared-saunas/signature-i/) (brand, page, 2026-10-10) |
| Weight | 428 lb | [sunlighten.com](https://www.sunlighten.com/saunas/signature-infrared-saunas/signature-i/) (brand, page, 2026-10-10) |
| Power | not published |  |
| Voltage | 120 | [sunlighten.com](https://www.sunlighten.com/saunas/signature-infrared-saunas/signature-i/) (brand, page, 2026-10-10) |
| Circuit | 20 A | [sunlighten.com](https://www.sunlighten.com/saunas/signature-infrared-saunas/signature-i/) (brand, page, 2026-10-10) |
| Plugs in | yes | [sunlighten.com](https://www.sunlighten.com/saunas/signature-infrared-saunas/signature-i/) (brand, page, 2026-10-10) |
| Top temperature (claimed) | not published |  |
| Heater | not published |  |
| Heater included in the price | not published |  |
| Wood | eucalyptus | [sunlighten.com](https://www.sunlighten.com/saunas/signature-infrared-saunas/signature-i/) (brand, page, 2026-10-10) |
| Thermally modified wood | not published |  |
| Wall / stave thickness | not published |  |
| Arrives | not published |  |
| Electrical safety listing | not published |  |
| Warranty: cabin | 7 years | [sunlighten.com](https://www.sunlighten.com/customer-service/warranty/) (brand, page, 2026-10-07) |
| Warranty: heater | 7 years | [sunlighten.com](https://www.sunlighten.com/customer-service/warranty/) (brand, page, 2026-10-07) |

## Where to buy

| Store | Price (USD) | Availability | Checked | Link |
|---|---|---|---|---|
| List price (Sunlighten) | $5,499 | in stock | 2026-10-07 | [source](https://www.sunlighten.com/saunas/signature-infrared-saunas/signature-i/) |

Prices are re-checked weekly; a date more than a month old means the store could not be re-read.

## The equivalent in other lines

Same category, different line:

- [Almost Heaven Appalachia 6 Person Cabin Sauna (electric)](https://saunagrid.com/products/almost-heaven-outdoor-appalachia-6-person-cabin-electric/) — $12,650
- [Almost Heaven Appalachia 6 Person Cabin Sauna (wood-fired)](https://saunagrid.com/products/almost-heaven-outdoor-appalachia-6-person-cabin-wood/) — $16,934
- [Almost Heaven Allegheny 6 Person Cabin Sauna (electric)](https://saunagrid.com/products/almost-heaven-outdoor-allegheny-6-person-cabin-electric/) — $10,722
- [Almost Heaven Allegheny 6 Person Cabin Sauna (wood-fired)](https://saunagrid.com/products/almost-heaven-outdoor-allegheny-6-person-cabin-wood/) — $15,006
- [Almost Heaven Hinton 2-3 Person Infrared Sauna](https://saunagrid.com/products/almost-heaven-infrared-hinton-2-3-person/) — $6,840
- [Almost Heaven Laurel 1 Person Infrared Sauna](https://saunagrid.com/products/almost-heaven-infrared-laurel-1-person/) — $5,999.99
- [Almost Heaven Blackwater 1-2 Person Mini-Cube Sauna](https://saunagrid.com/products/almost-heaven-outdoor-blackwater-1-2-person-mini-cube/) — $8,397
- [Almost Heaven Tyrol Indoor Sauna, Large 4-5 Person](https://saunagrid.com/products/almost-heaven-indoor-tyrol-large-4-5-person/) — $6,792


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SaunaGrid lists home saunas from every brand side by side, with a source for every spec and a date on every price. [How we compare](https://saunagrid.com/how-we-compare/). Data as of 2026-10-10.