Clearlight Sanctuary 2 leads on our weighted scoring by 0.7 points over Sunlighten Signature II. Sunlighten Signature II costs $1,499 less — about 21% — so the question is whether what Clearlight Sanctuary 2 adds is worth that to you. They separate most on price (Sunlighten Signature II), overall score (Clearlight Sanctuary 2) and type — those are the rows worth reading closely. In short: Clearlight Sanctuary 2 for indoor full-spectrum infrared with the best warranty; Sunlighten Signature II for two-person far-infrared sessions without 240V wiring.
| 2 products | ![]() Sunlighten Sunlighten Signature II | ![]() Clearlight Clearlight Sanctuary 2 |
|---|---|---|
| Price | $5,800 | $7,299 |
| Overall score | 8.0 | 8.7 |
| Type | Far-infrared (SoloCarbon) | Full-spectrum infrared |
| Heater power (kW) | 2,006W total draw (9 FIR heaters) | ~2.4 kW |
| Max temperature (°F) | — | 125–145 °F |
| Capacity (persons) | 2 persons | 2 persons |
| Voltage | 120V (NEMA 5-20R) | 120V / 20A (config) |
| Amperage (A) | 20A dedicated circuit required | 20 A |
| Wood | Eucalyptus (basswood weight also listed) | Cedar or basswood |
| Warm-up time (min) | — | 20–30 min |
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Sunlighten
Best for Two-person far-infrared sessions without 240V wiring
Clearlight
Best for Indoor full-spectrum infrared with the best warranty