Dr. Renú SpectraLift Advanced and Shark CryoGlow FW312, side by side. They share 630 nm; Dr. Renú SpectraLift lists 280 LEDs and Shark CryoGlow lists 480 LEDs in 160 tri-wick packages. What the brand lists only; neither is ranked.
Both list red and near-infrared light, the pairing used in several wrinkle studies.
Both list blue light, which acne studies paired with red.
Sessions differ: 10–15 min versus 6.4 min ageing · 8.4 min clearing · 4.3 min maintenance. Session time alone does not set the dose; output matters too.
Six studies match both, including why the amount of light matters.
| Specification |  Dr. RenúSpectraLift Advanced |  SharkCryoGlow FW312 |
|---|---|---|
| Wavelengths | 465 · 530 · 630–660 · 850 nm | 415 · 630 · 830 nm |
| LED count | 280 | 480 LEDs in 160 tri-wick packages |
| Reported irradiance | 26.9–50.0 mW/cm² by mode, brand-published report | Not found on checked page |
| Session | 10–15 min | 6.4 min ageing · 8.4 min clearing · 4.3 min maintenance |
| Fit | Flexible silicone · 300 g | Rigid shell · under-eye cooling |
| Power & controls | 2000 mAh · USB-C | Rechargeable; check regional manual |
| Regulatory claim | US platform FDA cleared, brand claim; EU CE under LVD/RoHS, not MDR medical-device marking | FDA cleared CryoGlow FW3XXXX family; other regional markings not reverified |
| Reference price | €233 sale · €389 regularManufacturer EU page, 2 Nov 2026; promotion may change | US$349.99Manufacturer US page, 2 Nov 2026 |
| Data origin | Manufacturer product page, device passport and FDA model record | Manufacturer product page and FDA summary K242796 |
LED count and output are not measures of effectiveness. Output figures use different, often unspecified measurement conditions. Prices keep their original currency and are not current offers.
The Dr. Renú SpectraLift lists 5 wavelengths and the Shark CryoGlow lists 3. More wavelengths is not the same as more effective.
Yes: 630 nm.
6 of the 15 summarised studies match both. 4 match only the Dr. Renú SpectraLift and 4 match only the Shark CryoGlow.
The manufacturer lists 280 diodes, nine modes, 10–15-minute sessions 3–4 times weekly, a 2000 mAh battery and USB-C charging. Its device passport reports per-mode output. The brand features supportive dermatologist testimonials on its product page; these are brand-hosted opinions, not a clinical trial. Reference price checked 2 November 2026: €233 promotional, €389 regular. Follow the current manual.
Manufacturer product page, device passport and FDA model record.
FDA summary K242796 lists 480 LEDs in 160 tri-wick packages and nominal 415, 630 and 830 nm light. Listed programmes last 6.4 minutes for Better Aging, 8.4 for Skin Clearing and 4.3 for Skin Sustain. Use the FW312 manual. Manufacturer US price checked 2 November 2026: $349.99.
Manufacturer product page and FDA summary K242796.