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?

Neither has a seated reading. The Sanctuary rests on Clearlight-commissioned Vitatech tests of bare heater panels (peaks of 0.12 to 0.36 mG at 2 inches), which earn partial credit in our scoring; the Amplify's under-1 mG claim comes from a Sunlighten-commissioned report that lists the Amplify II rather than this model, so it earns none.

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Sunlighten Amplify vs Clearlight Sanctuary 1

Both clear the full-spectrum disclosure bar with a separate near-infrared emitter. In our scoring the Sanctuary comes out ahead: it earns partial EMF credit for a lab report tied to its heaters, while the Amplify earns none because its report lists the Amplify II. The Sanctuary also has the stronger warranty; the Amplify is about $1,000 less. In our view the Sanctuary is the more complete pick and 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 comes from a Sunlighten-commissioned Vitatech report that lists the Amplify II rather than this model, so we treat it as the brand's own claim. The Clearlight Sanctuary 1 ($6,799) adds a real full-spectrum heater and rests on Clearlight-commissioned Vitatech tests of bare heater panels (peaks of 0.12 to 0.36 mG at 2 inches), with no seated in-cabin reading published.

Sunlighten Amplify 1-Person

5.2

Limited

Clearlight Sanctuary 1

5.8

Limited

$5,800	Price	$6,799
1 mG (unverified)	Verified EMF	0.36 mG (unverified)
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

0.0	Verified EMF30%	2.0
9.0	Spectrum disclosure20%	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?: Neither has a seated reading. The Sanctuary rests on Clearlight-commissioned Vitatech tests of bare heater panels (peaks of 0.12 to 0.36 mG at 2 inches), which earn partial credit in our scoring; the Amplify's under-1 mG claim comes from a Sunlighten-commissioned report that lists the Amplify II rather than this model, so it earns none.