Sunlighten Amplify II Review: The Hottest Infrared?
Sunlighten Amplify II review: a 2-person full-spectrum infrared sauna that owners say holds 165–168°F. What owners report about heat, service and value.
The Sunlighten Amplify II is the hottest 120V infrared sauna we found, with owners reporting a steady 165–168°F, but Sunlighten's sales follow-up and after-sales service draw consistent complaints.
- Best for
- The hottest indoor infrared session
- Skip it if
- Smooth after-sales service matters more to you than peak temperature.
- Price
- About $5,800–$6,000
Sunlighten Amplify II specs
| Type | Full-spectrum infrared |
|---|---|
| Capacity | 2 people |
| Max temperature | Up to 170°F (owners report a steady 165–168°F) |
| Power | 120V |
| Warranty | 7 years cabinet and heaters, 3 years controls, 1 year stereo |
| Price | About $5,800–$6,000 (checked October 2026) |
| Size | 50.9″W × 45.9″D × 77.7″H |
What we like
- Owners report steady 165–168°F temperatures
- Front heaters angled toward you when seated
- Less glass and fewer draughts than Clearlight Sanctuary
- Several upgrade options (red light, sound)
What we don't
- Owners describe pushy sales follow-up
- Mixed service record when things break
- Shorter warranty than Clearlight
The Sunlighten Amplify II is a two-person full-spectrum infrared sauna that owners report holds 165–168°F, the hottest real-world temperature we found from any 120V infrared cabin. As of October 2026, Sunlighten is the most-searched sauna brand in the US, with about 11,000 searches a month, and the Amplify II is the model that earns its reputation for heat. The trade-off is a buying and service experience that owners describe as uneven.
Is the Sunlighten Amplify II worth it?
The Sunlighten Amplify II is worth it if peak heat is your priority. It pairs far-infrared SoloCarbon heaters with halogen full-spectrum heaters that push the air temperature higher than typical infrared cabins, on a standard 120V circuit.
Great for
- People who’ve found infrared saunas too mild
- Buyers who want low-EMF heaters from an established brand (Sunlighten claims under 1 mG)
- Couples who’ll use it daily
Skip it if
- You hate sales calls. Owners describe relentless follow-up.
- Smooth after-sales service matters more to you than peak heat
- The Sun Home Equinox is cheaper that day. It appears to be the same cabin.
Heat and performance
The Sunlighten Amplify II is the heat leader of the infrared category. An Amplify II owner reports it consistently holds 165–168°F with ambient room temperatures around 70°F, even after opening the door during a session. The owner credits two design details: front full-spectrum heaters angled toward you when seated, and less glass than the Clearlight Sanctuary, so less heat escapes.
A longtime Sunlighten owner who upgraded to the larger 4-person Amplify said they were “struggling to catch my breath” after 16 minutes at 170°F, which is exactly the intensity some buyers want. Sunlighten estimates warm-up at roughly 1°F per minute in ideal conditions, so plan on 20–40 minutes depending on your room.
Size, power and installation
The Sunlighten Amplify II measures 50.9″ W × 45.9″ D × 77.7″ H and weighs about 456 lb in basswood or 541 lb in eucalyptus. It runs on 120V, so most homes need only a dedicated circuit, not a 240V run.
Owners who mention assembly generally call it easy. The panels clip together, and Sunlighten publishes assembly guides and videos on its support page.
Build quality and durability
The Sunlighten Amplify II comes in basswood (nearly scent-free, popular with sensitive buyers) or eucalyptus. Owners praise the door seal. One says it’s far better than the Clearlight Sanctuary they’d used, which has a gap between the door and wall where cool air flows in.
Durability reports are mixed across the Sunlighten line. Some owners report years of reliable use. Others report heater panels, power boxes or control screens failing, particularly on the mPulse and Signature models. One mPulse owner says the newer version swapped some heaters for red-light panels and heats more slowly than before.
Features and extras
- Halogen full-spectrum heaters under the benches and in the corner for higher air temperature
- Chromotherapy and built-in sound
- Optional upgrades: red light (Amplify RED), cushions and packages
- Low EMF: Sunlighten claims below 1 milligauss
A week-one Amplify II owner loves the sauna but reports Bluetooth audio that fades in and out, and a door magnet that doesn’t quite catch. Sunlighten’s fix was to power cycle, which “usually works temporarily”.
What owners say
Sunlighten has a large, mostly positive owner base and a vocal group of unhappy customers:
- Trustpilot: 4.6/5 from about 4,080 reviews, with 86% five-star and 6% one-star. Owners frequently praise knowledgeable sales staff and product quality.
- Heat: consistently the standout. Owners call it the hottest infrared sauna they’ve owned.
- Sales experience: multiple buyers describe daily calls and texts until they purchased. One said the “hard sell” turned them off the brand.
- Service when things break: one buyer who paid $8,000 for a defective unit says they were expected to rewire panels themselves. Others report a known mPulse screen freeze, obsolete control units, and a warranty dispute after the company’s rename from Sunlight Saunas.
- Responsiveness: Sunlighten replies to about 97% of negative Trustpilot reviews, usually inviting a call.
Warranty and customer service
The Sunlighten Amplify II carries 7 years on the cabinet and heaters, 3 years on controls and 1 year on the stereo. Owners say parts are shipped for you or an electrician to fit, and some report paying for labour. Get the warranty terms in writing before you buy, including who pays for labour and shipping on parts.
Price and total cost
As of October 2026, Sunlighten’s US shop lists the Amplify II at $5,799 (basswood) or $5,999 (eucalyptus). Promotions are frequent, and one Redditor reports negotiating through a dealer.
| Cost | Typical amount |
|---|---|
| Sauna | $5,800–$6,000 |
| Dedicated 120V circuit (if needed) | $0–$800 |
| Optional packages (cushions, red light) | $500–$1,200 |
| Typical total | $5,800–$7,000 |
Sunlighten Amplify II vs Sun Home Equinox
The Sunlighten Amplify II and Sun Home Equinox appear to be the same cabin, so choose on price and buying experience. The Amplify II is often slightly cheaper and has the longer brand history. The Equinox lists a price you can order online without a sales call. Read our Sun Home Equinox review.
Sunlighten Amplify II vs Clearlight Sanctuary 2
The Clearlight Sanctuary 2 has the stronger long-term reliability record and a lifetime warranty, but owners report it runs around 140°F. The Amplify II is roughly 25°F hotter. If you want intense heat, choose the Amplify. If you want the best odds of a decade without problems, Clearlight’s owner record is stronger.
Final verdict
The Sunlighten Amplify II is the sauna to buy if heat is what you’re after. Owners consistently report 165–168°F on household power. Go in with a plan for the sales process (decide your budget first and get the price in writing) and keep careful records in case you need warranty service. If the Sun Home Equinox is cheaper the day you buy, it’s the same cabin.
How we rated the Sunlighten Amplify II
Our rating is based on verified specifications and owner reports, not hands-on testing. How we research and score.
| Heat and performance | 4.9 | |
|---|---|---|
| Build quality and owner-reported reliability | 4.2 | |
| Ease of setup and installation | 4.3 | |
| Warranty and customer service | 3.4 | |
| Value for money | 4.2 | |
| Overall | 4.2 |
Head-to-head: Sun Home vs Sunlighten · Sunlighten vs Clearlight
Featured in: Best home saunas · Best infrared saunas
Sunlighten Amplify II FAQ
How hot does the Sunlighten Amplify II get?
Sunlighten rates the Amplify II to about 170°F. Owners report it holds a steady 165–168°F in practice, even with the door opened mid-session, making it one of the hottest infrared saunas available on a 120V circuit.
How much does the Sunlighten Amplify II cost?
As of October 2026, Sunlighten's US shop lists the Amplify II at $5,799 in basswood and $5,999 in eucalyptus, before promotions. Some buyers report negotiating discounts through dealers.
Is the Sunlighten Amplify II the same as the Sun Home Equinox?
They appear to share the same cabin. They have identical dimensions and heater layouts, and a buyer who ordered an Equinox received a Sunlighten Amplify II fulfilled by Sunlighten. Compare both prices before buying.
What are the downsides of the Sunlighten Amplify II?
The most common complaints are aggressive sales follow-up, finicky Bluetooth audio, and slow or frustrating repairs when components fail. The cabin itself gets strong reviews for heat and door seal.
Sources
- Sunlighten: Amplify II product page
- Sunlighten US shop feed (Amplify II Eucalyptus $5,999 / Basswood $5,799)
- r/infraredsauna: Sunlighten Amplify in-depth review
- r/infraredsauna: Amplify II Bluetooth connectivity
- r/infraredsauna: Clearlight Saunas (Amplify 2 owner comparison)
- r/infraredsauna: Warning against buying Sunlighten sauna
- Trustpilot: Sunlighten (4.6/5, ~4,080 reviews)