Sunlighten Amplify Full-Spectrum Infrared vs Sunlighten Solo System (portable)
$5,999 against $2,099. Here is where the $3,900 difference actually goes.
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Higher lab score
Sunlighten
Amplify Full-Spectrum Infrared
$5,999
8.6 / 10
Indoor installs where a traditional sauna's moisture is not an option
Sunlighten
Solo System (portable)
$2,099
7.8 / 10
Renters, small apartments, and anyone testing whether they will actually use a sauna
Specifications side by side
| Spec | Sunlighten Amplify Full-Spectrum Infrared | Sunlighten Solo System (portable) |
|---|---|---|
| Price | $5,999 | $2,099 |
| Lab score | 8.6 | 7.8 |
| Max temp | 170°F (mfr) | Not published (mfr) |
| Heat type | Full-spectrum (near/mid/far) | Far infrared |
| Electrical | 120V (20A dedicated) or 240V by model | Standard 120V |
| Warranty | 7 years | 7 years |
| EMF | Low-EMF SoloCarbon heaters | — |
| Form | — | Lay-down soft shell |
The verdict
Sunlighten Amplify Full-Spectrum Infrared takes the higher score here. The indoor infrared cabin that actually gets hot — 170°F, which most infrared cabins never reach. If infrared has disappointed you before, this is why.
The counter-argument for the Sunlighten Solo System (portable) is straightforward: it costs $3,900 less. Packs away under a bed. The compromise is real — you sweat lying down with your head outside — but it is the only sauna on this list a renter can own.
Put plainly — if your constraint is budget, take the Solo System (portable) and put the $3,900 toward installation, which is the line item most first-time buyers underestimate. If your constraint is that you want to buy once, the Amplify Full-Spectrum Infrared is the one you will not be replacing.
What each one is good at
Sunlighten Amplify Full-Spectrum Infrared
Strengths
- Reaches 170°F, closing most of the gap with traditional saunas
- Thick insulation and double-pane glass hold heat properly
- 7-year warranty is among the longest in the category
Compromises
- Priced within a few hundred dollars of a full 6-person outdoor thermowood barrel, before either one's electrical work
- 240V models still need an electrician despite 'plug-in' marketing on smaller ones
- Assembly is a two-person half-day job indoors
Sunlighten Solo System (portable)
Strengths
- Plugs into any standard outlet with no electrical work at all
- Stores flat when not in use
- Cheapest route to consistent infrared sessions at home
Compromises
- Head stays outside the unit — no facial or respiratory heat
- Not a social or ritual experience
- Soft-shell durability is well below a cabin
Read the full ranking
Both products are placed in context, against the whole field and with the installed cost worked out, in these guides:
- The best home saunas of 2026: indoor, outdoor and the $2,099 exception
- Red light sauna: what the term means, and what dose you actually get
- Infrared vs traditional sauna: they are different appliances, not price tiers
- How hot should a sauna be? Temperature by sauna type, measured at the bench
- Sunlighten sauna review: the three models, priced, and who each one is for
More head-to-heads
- Sunlighten Amplify Full-Spectrum Infrared vs Sunlighten Signature Far Infrared
- Sunlighten Amplify Full-Spectrum Infrared vs Sun Home Saunas Pod 1-Person Indoor Red Light & Infrared
- Sunlighten Solo System (portable) vs Sunlighten Signature Far Infrared
- Sunlighten Solo System (portable) vs Sun Home Saunas Pod 1-Person Indoor Red Light & Infrared
Prices captured September 2026 from manufacturer and retailer pages and subject to frequent promotion. Confirm before buying. See our testing method for how lab scores are assigned.