Different technology.
Signature focuses on SoloCarbon far-infrared cabin heating rather than the full-spectrum/red-light design distinctions found in other lines.
← All Sunlighten collections
FAR-INFRARED CABIN / 04
Signature Collection.
The simpler far-infrared family deserves its own comparison.
A more straightforward far-infrared sauna cabin family using Sunlighten’s SoloCarbon heating technology.
Fit and everyday use.
The current collection highlights I and II, while official US support and shop resources also list III and IV. Check availability and model-year specifics for those larger cabins rather than assuming they were discontinued or are sold everywhere.
Check the exact generation.
The pictured Signature III is an official US shop collection example, not a substitute for the precise specifications of each size.
MODELS / 4 DOCUMENTED ENTRIES
Explore the models.
I, II, III and IV in manufacturer support; availability varies.
CURRENT FAMILY
Signature I
1-person
Single-person far-infrared Signature cabin using SoloCarbon technology.
Read the model-specific field guide →CURRENT FAMILYSignature II
2-person
Two-person far-infrared Signature cabin.
Read the model-specific field guide →SUPPORT / STORE LISTINGSignature III
3-person
Three-person model appears in manufacturer support, guides and US retail listings; not emphasized in the smaller-capacity collection comparison.
Read the model-specific field guide →SUPPORT / STORE LISTINGSignature IV
4-person
Four-person model appears in manufacturer support, guides and US retail listings; confirm sale status by region.
Read the model-specific field guide →HOW IT WORKS / MANUFACTURER DESCRIPTION
Technology context.
Far infrared is the core Signature category; the standard product comparison identifies no integrated red light therapy.
These terms describe product engineering and marketing. They do not establish whether this family improves CRPS pain, function, sleep or any individual medical outcome.
Read the official Signature family page ↗Disclosure / Evidence limits
This independent library is part of a personal history with CRPS, including previous employment at Sunlighten. It is neither a current product endorsement nor medical advice. Understand the evidence questions → Read the original story →