Are both of these really full spectrum?

Yes. The Amplify uses real 660 and 850 nm near-infrared LEDs plus far-infrared, and the Sanctuary 1 adds a dedicated full-spectrum heater. Both back the full-spectrum label with a separate near-infrared emitter, which is the test our spectrum axis applies.

Which has the better EMF evidence at the seat?

The Clearlight Sanctuary 1, in our scoring: its commissioned VitaTech report reads under 1 mG including at the seat. The Sunlighten Amplify's under-1 mG claim is position-sensitive, with independent readings up to about 2 mG at the seated position, so it is contested.

Infrared sauna · Compare

Sunlighten Amplify vs Clearlight Sanctuary 1

Both clear the full-spectrum honesty bar with real near-infrared. They split on EMF evidence: the Sanctuary's seated figure is better-documented in our scoring, and its lifetime warranty is stronger, while the Amplify is a few hundred dollars less with a contested seat reading. In our view the Sanctuary is the more complete honesty pick; the Amplify is the value-leaning full-spectrum option.

Two full-spectrum one-person cabins with real near-infrared emitters. The Sunlighten Amplify ($5,800) pairs 660 and 850 nm NIR LEDs with far-infrared, but its under-1 mG claim is position-sensitive, with independent meters reading up to about 2 mG at the seat. The Clearlight Sanctuary 1 ($6,799) adds a real full-spectrum heater and carries a commissioned VitaTech report reading under 1 mG including at the seat.

Sunlighten Amplify 1-Person

5.8

Limited

Clearlight Sanctuary 1

7.9

Strong

$5,800	Price	$6,799
1 mG (unverified)	Verified EMF	0.8 mG at body
full (real NIR)	Spectrum	full (real NIR)
6 carbon (SoloCarbon) + LED NIR + floor	Heaters	6 carbon-ceramic hybrid (True Wave) + full-spectrum element + floor
listed	ETL/UL	listed
cabin (1-person)	Type	cabin (1-person)

Score breakdown

2.0	Verified EMF30%	9.0
9.0	Spectrum Honesty20%	9.0
10.0	Heat & Coverage15%	10.0
2.5	Value20%	2.5
9.0	Safety & Build15%	9.0

FAQ

Are both of these really full spectrum?: Yes. The Amplify uses real 660 and 850 nm near-infrared LEDs plus far-infrared, and the Sanctuary 1 adds a dedicated full-spectrum heater. Both back the full-spectrum label with a separate near-infrared emitter, which is the test our spectrum axis applies.
Which has the better EMF evidence at the seat?: The Clearlight Sanctuary 1, in our scoring: its commissioned VitaTech report reads under 1 mG including at the seat. The Sunlighten Amplify's under-1 mG claim is position-sensitive, with independent readings up to about 2 mG at the seated position, so it is contested.