Quick Answer: Sunlighten splits its lineup into four distinct products, not four sizes of the same sauna. The mPulse is the flagship — full-spectrum heat plus red light therapy, from about $5,500 up past $16,000 for larger configurations. The Amplify ($5,799+) matches the full-spectrum heat but skips red light, and the Signature ($5,099+) is far-infrared only. The Solo ($2,099) is a portable infrared dome, not a cabin at all — the cheapest way to try Sunlighten’s heat before committing to a full-size install. Pricing above is per Sunlighten’s own 2026 shop listings.
Sunlighten is the most technically ambitious brand we track — it’s the only maker that splits its catalog by wavelength band rather than just size or finish. That makes shopping it confusing: the model name alone tells you whether you’re buying far-infrared-only heat, full spectrum, or full spectrum with red light on top. Below we break down all four lines so you buy the one that actually matches what you want, not just the one your search landed on.
Sunlighten lineup at a glance
| Line | Best for | Wavelengths | Capacity | Price |
|---|---|---|---|---|
| Solo | Budget / small space | Far infrared (dome) | 1 person | ~$2,099 |
| Signature | Cheapest full cabin | Far infrared only | 1-2 person | $5,099-$5,599 |
| Amplify | Full spectrum, no red light | Near + mid + far | 2-4 person | $5,799+ |
| mPulse | Full technology | Near + mid + far + red light | 1-5 person | $5,500-$16,000+ |
1. Solo — Best Budget / Small Space
Sunlighten Solo System Portable Infrared Dome
- Portable far-infrared dome — you lie inside it rather than sit upright, unlike every other Sunlighten line.
- Starts at $2,099 per Sunlighten's own shop, roughly a third the price of the cheapest full cabin (Signature I, $5,099).
- Folds down for storage, no dedicated electrical circuit or floor space required — the right entry point for renters or small apartments.
New to Amazon Prime? Try Prime free for 30 days — free two-day shipping is worth having if you’re testing a portable dome before deciding whether to size up to a full cabin later. The Solo is the cheapest way into Sunlighten’s brand by a wide margin, but it’s a genuinely different product category from the other three lines — a lie-down dome, not a stand-up or sit-in room. See our best sauna dome roundup for how the Solo stacks up against LifePro’s InfraDome and budget generic capsule domes. Think of it as a trial run: if you use it regularly, the jump to a Signature cabin is a size upgrade, not a technology change, since both are far-infrared only.
2. Signature — Best Cheapest Full Cabin
Sunlighten Signature Far Infrared Sauna
- Far-infrared only — no near or mid band, and no red light therapy, unlike Amplify and mPulse.
- Signature I (1-person) starts at $5,099; Signature II (2-person) is $5,599, per Sunlighten's own shop.
- Cheapest way into a genuine walk-in Sunlighten cabin rather than the portable Solo dome.
Signature is the tier most likely to disappoint someone expecting the brand’s full technology at full-cabin size — it’s far-infrared only, the same single wavelength band a budget Dynamic cabin uses (see our best Dynamic sauna guide for that comparison at roughly a third of the price). What you’re paying the extra few thousand for is Sunlighten’s build and the option to upgrade later within the same ecosystem, not additional wavelength coverage. If near-infrared or red light matters to you, skip straight to Amplify or mPulse — Signature won’t add either no matter which size you buy.
3. Amplify — Best Full Spectrum Without Red Light
Sunlighten Amplify Full Spectrum Sauna
- Genuine full spectrum — near, mid, and far infrared bands — without the red light therapy add-on.
- Starts at $5,799 for the Amplify II and III, per Sunlighten's own 2026 pricing.
- Sits between Signature and mPulse: full wavelength coverage at a lower price than the flagship.
Amplify is the line most buyers actually want but rarely search for by name: it delivers the same near-mid-far full-spectrum heat as mPulse for several thousand dollars less, just without red light therapy layered on top. At $5,799 and up it also undercuts the cheapest genuine full-spectrum cabins from other brands we track — Golden Designs’ Reserve Edition starts at $4,999 and Clearlight’s Sanctuary 1 at $6,999, so Amplify lands squarely between them. See our best full spectrum infrared sauna roundup for how all three stack up side by side.
4. mPulse — Best Full Technology
Sunlighten mPulse Smart Full Spectrum Sauna with Red Light
- The only Sunlighten line that adds red light therapy on top of full-spectrum near/mid/far heat.
- Uses three separate emitter layers — Solocarbon for far, Kapton polyimide for mid, LED for near — instead of one blended panel.
- Runs from about $5,500 for the smallest 1-person configuration past $16,000 for larger, fully-loaded models.
mPulse is Sunlighten’s answer to “why buy the brand at all instead of Golden Designs or Clearlight” — it’s the only cabin here with red light therapy built in alongside true full-spectrum heat, and it’s built on an engineering argument the company has stuck to for years: no single heater panel can physically peak at near, mid, and far wavelengths simultaneously, so mPulse uses three separate emitter types rather than Clearlight’s single True Wave panel. That approach is why it’s also the most expensive and most app-customizable option in this guide. For the direct brand-versus-brand read on whether that’s worth Clearlight’s stronger warranty instead, see our Sunlighten vs. Clearlight comparison.
How the four Sunlighten lines actually differ
The confusion with Sunlighten isn’t size — it’s that each line is a different product, not a different capacity of the same sauna:
- Solo ($2,099): a portable lie-down dome, far-infrared only. Not a cabin.
- Signature ($5,099-$5,599): the cheapest genuine walk-in cabin, far-infrared only, no red light.
- Amplify ($5,799+): adds near and mid infrared for true full spectrum, still no red light.
- mPulse ($5,500-$16,000+): full spectrum plus red light therapy, the only line with all three wavelength bands and the light feature together.
Warranty is the same tiered structure across every cabin line regardless of price: 7 years on cabinetry and heaters, 3 years on controls, and just 1 year on glass doors and audio, per Sunlighten’s published residential warranty terms. That’s notably shorter than Clearlight’s lifetime-on-interior-components coverage — worth weighing against the extra wavelength control if warranty length matters more to you than app customization. Our sauna EMF explained guide covers how Sunlighten’s SoloCarbon heaters compare to other brands’ EMF specs if that’s a deciding factor too.
The bottom line
For most buyers who specifically want the Sunlighten name, the Amplify at $5,799+ is the smartest buy — genuine full-spectrum heat without paying mPulse’s red-light premium. Want the brand’s full technology and app control, the mPulse ($5,500-$16,000+) is the only line with red light included, though Clearlight’s Sanctuary line matches its full-spectrum heat with a far stronger lifetime warranty at a similar price — see our Sunlighten vs. Clearlight breakdown before you commit. Tight on space or budget, the Solo dome at $2,099 is a genuine way to try Sunlighten’s heat first. And if you just want the cheapest walk-in cabin with the badge, Signature starts at $5,099 — just know you’re buying far-infrared only.
Next steps: our best sauna brands roundup ranks Sunlighten against Golden Designs, Clearlight, and Sun Home, and best full spectrum infrared sauna compares every genuine full-spectrum cabin we track side by side.