Quick Answer: Clearlight builds every Sanctuary sauna with the same True Wave full spectrum heater and backs it with a lifetime warranty on all interior components plus 7 years of included labor. Sunlighten splits its lineup by wavelength instead — far-infrared-only Signature cabins from about $4,495, full spectrum Amplify and mPulse cabins from about $5,500 — under a tiered warranty of 7 years on cabinetry/heaters but just 1 year on glass and audio. Choose Clearlight if you want full spectrum heat as the default and the stronger warranty; choose Sunlighten if you specifically want a cheaper far-infrared-only cabin or the most app-driven, customizable heat controls.
Both companies are premium, dealer-direct sauna brands, not Amazon-warehouse products, so this comparison focuses on what actually separates them: heater technology, warranty coverage, price tiers, and which wavelength bands you get by default.
Sunlighten vs. Clearlight at a glance
| Sunlighten | Clearlight | |
|---|---|---|
| Heater technology | SoloCarbon (far-only Signature) or PulseIQ separate near/mid/far emitters (mPulse) | True Wave hybrid carbon-ceramic, near+mid+far from one panel |
| Full spectrum by default? | No — only Amplify and mPulse lines | Yes — every Sanctuary model |
| Entry price | ~$4,495 (Signature, far-infrared only) | ~$4,000-$6,999 (Sanctuary 1, full spectrum) |
| Full spectrum starting price | ~$5,500 (mPulse) | ~$4,000-$6,999 (every model) |
| Warranty | 7 yr cabinetry/heaters, 3 yr controls, 1 yr glass/audio | Lifetime on all interior components + 7 yr labor |
| Outdoor models | None | Sanctuary Outdoor 2 & Outdoor 5 |
Heater technology: one panel vs. specialized emitters
Clearlight’s True Wave heaters are a hybrid design — carbon panels infused with ceramic particulates — and every Sanctuary model uses two 500-watt True Wave full spectrum panels that Clearlight states deliver roughly one-third near, one-third mid, and one-third far infrared simultaneously, supplemented by additional far-infrared-only panels on the back, side, and floor for overall heat volume.
Sunlighten takes a segmented approach instead. Its SoloCarbon heaters — thin enough, per Sunlighten, to fold like a sheet of paper — power the far-infrared-only Signature line. The mPulse line swaps in Sunlighten’s PulseIQ system, which uses separate emitter layers for each band (a SoloCarbon layer for far, a Kapton polyimide layer for mid, and LED elements for near) rather than one blended panel. Sunlighten’s engineering argument is that no single heater can genuinely peak at three wavelengths at once — which is also why mPulse costs more and offers more granular per-band control than a Clearlight Sanctuary.
Clearlight Sanctuary 2 Full Spectrum Sauna
- True Wave full spectrum heaters standard — no far-only tier to accidentally choose instead.
- Full lifetime warranty on every interior component, plus 7 years of included technician labor.
- Eco-certified Western Red Cedar or Basswood cabinetry.
Sauna time is story time — start a free Audible trial and get your first audiobook free for the 30-45 minute sessions either brand is built around.
Warranty: the biggest real gap between these two brands
This is the single clearest differentiator in this comparison, and it isn’t close. Clearlight’s residential warranty covers every interior component — heaters, wood, controls, electronics, lighting, and audio — for the life of the original owner, with replacement parts supplied at no cost indefinitely and 7 years of included technician labor if you’d rather not do a repair yourself. After that labor window, parts are still free and Clearlight designs its saunas to be user-serviceable, so most repairs are straightforward swaps.
Sunlighten’s residential warranty is tiered by component instead: 7 years on cabinetry and heaters, 3 years on controls, and only 1 year on glass doors and audio (commercial coverage is shorter across the board). That’s a solid warranty by home-appliance standards, but it’s meaningfully shorter than Clearlight’s lifetime structure — especially on the parts (glass, audio) most likely to need replacing after year one.
Sunlighten mPulse Smart Full Spectrum Sauna
- PulseIQ technology lets you dial near, mid, and far infrared independently rather than accepting a fixed blend.
- Preset programs (Detox, Cardio, Relaxation, Weight Loss) auto-adjust the wavelength ratio per session.
- Smart controls and app connectivity — the most tech-forward cabin in either brand's lineup.
Full spectrum vs. far-infrared-only: the tier trap
The honesty-anchor buyers most often miss: Sunlighten’s cheapest cabins are not full spectrum. The Signature line — Sunlighten’s most affordable, starting around $4,495 with the 2-person Signature II the brand’s most-purchased model at roughly $4,995 — runs SoloCarbon far-infrared-only heaters. You only get near and mid infrared by stepping up to Amplify or mPulse, both of which start meaningfully higher.
Clearlight sidesteps that trap by design: every Sanctuary model, from the 1-person entry cabin up, uses the same True Wave full spectrum heater. There’s no cheaper Clearlight tier that quietly drops a wavelength band. That makes Clearlight the simpler full-spectrum shop, but it also means you can’t buy an official Clearlight cabin priced against Sunlighten’s far-only Signature line — if a genuine far-infrared-only cabin at the lowest possible price is the goal, Sunlighten Signature (or our Golden Designs and Dynamic roundups, both far-only under about $4,500) are the better price match, not Clearlight.
Outdoor installation: a real Clearlight-only feature
If an outdoor cabin is on your shortlist, Clearlight is currently the only one of these two brands that sells one. The Sanctuary Outdoor 2 and Sanctuary Outdoor 5 are purpose-built for exterior installation. Sunlighten does not currently offer an outdoor-rated model — every cabin in its lineup, including mPulse and Amplify, is designed for indoor use only.
The bottom line
Buy Clearlight if you want full spectrum heat as the default in every model, the strongest warranty of the two (lifetime on interior components, 7 years of included labor), or an outdoor-rated cabin. Buy Sunlighten if you want the option of a genuinely cheaper far-infrared-only cabin (Signature, from ~$4,495), or if per-band heat control and app-driven presets (mPulse’s PulseIQ) matter more to you than warranty length.
If neither premium brand fits your budget, our best full spectrum infrared sauna guide covers a cheaper full-spectrum entry point (Golden Designs Reserve Edition, from $4,999), and our best infrared sauna pillar guide ranks far-infrared-only cabins starting under $2,000.