- Wavelengths
- The Dr. Dennis Gross DRx SpectraLite FaceWare Pro emits at 415 nm, 630 nm. The Shark CryoGlow (FW312) emits at 415 nm, 630 nm, 830 nm. The Shark CryoGlow (FW312) covers both red and near-infrared, the two ranges with the strongest published evidence for skin; the Dr. Dennis Gross DRx SpectraLite FaceWare Pro does not.
- LED count
- The Dr. Dennis Gross DRx SpectraLite FaceWare Pro carries more diodes: 162 against 160. Diode count sets how evenly light reaches the face — a coverage figure, not an efficacy figure.
- Published irradiance
- Neither brand publishes an irradiance figure, so the dose the two masks deliver cannot be compared from the specification sheets.
- Regulatory
- Neither prints a searchable 510(k) number; both state their clearance without one. These devices are FDA cleared, not FDA approved — clearance is a safety and manufacturing signal, not proof of results.
- Session and modes
- The Dr. Dennis Gross DRx SpectraLite FaceWare Pro runs 3 min per session (red, blue or both). The Shark CryoGlow (FW312) runs 8 min (3 targeted programmes + under-eye cooling).
- Fit and power
- Dr. Dennis Gross DRx SpectraLite FaceWare Pro: rigid hard shell; corded controller. Shark CryoGlow (FW312): rigid, multi-zone; corded USB-C (cooling needs power).