| Wavelength Configuration | Red light, near-infrared light, or a combined configuration | Commonly published ranges include approximately 630–660 nm for red light and 810–850 nm for near-infrared light | Independent spectral measurement or a detailed LED specification sheet | Wavelength affects penetration, treatment protocols, and the type of claims that can be responsibly made |
| Irradiance at Treatment Distance | Optical power delivered to the client’s skin, not only the LED’s electrical rating | Should be stated in mW/cm² at a defined distance, such as direct contact or 15–30 cm | Test report showing measurement method, distance, wavelength, and tolerance | Irradiance is required to calculate a consistent treatment dose |
| Energy Dose | Fluence delivered during each session | Fluence is calculated as: irradiance × time; the unit is J/cm² | Sample treatment protocol showing irradiance, session duration, and calculated fluence | A transparent dose calculation makes protocols easier to reproduce and compare |
| Treatment Coverage | Face-only, body-panel, bed-style, or modular coverage | Compare active illuminated area, usable treatment distance, and the number of repositioning steps | Technical drawing with active area dimensions and recommended positioning distance | Larger or better-positioned coverage can improve workflow efficiency and session consistency |
| Session Control | Timer accuracy, preset programs, intensity control, and independent wavelength control | A programmable timer and clearly displayed treatment settings are preferable for repeatable service delivery | User manual, control-panel specifications, and demonstration of saved protocols | Consistent controls reduce operator variation between appointments |
| Thermal Management | Cooling fans, passive heat dissipation, surface temperature, and noise level | Ask for operating temperature and noise data measured under normal treatment conditions | Thermal test results, maintenance instructions, and noise specification in dB(A) | Lower heat and noise can improve client comfort and staff usability |
| Electrical Safety | Protection against electric shock, overheating, abnormal operation, and power fluctuations | Look for documented testing against applicable medical or electrical safety requirements | Electrical safety test report, declaration of conformity, and installation requirements | Proper safety documentation supports risk management in a commercial spa environment |
| Photobiological Safety | Eye and skin exposure risks associated with the emitted optical radiation | IEC 62471 is commonly used to evaluate photobiological safety of lamps and lamp systems | Photobiological safety assessment and written eye-protection guidance | Clear exposure controls help staff apply the equipment responsibly |
| Regulatory Position | Whether the product is marketed as a cosmetic wellness device or regulated medical equipment in the target market | Regulatory classification and permitted claims vary by country and intended use | Registration details, intended-use statement, labeling, and applicable conformity documents | The regulatory position determines which marketing and treatment claims are appropriate |
| Build Quality and Serviceability | Frame strength, cable routing, replaceable parts, cleaning surfaces, and access for servicing | Compare materials, moving-part design, replacement intervals, and expected operating hours | Service manual, spare-parts list, maintenance schedule, and repair process | Serviceable equipment can reduce downtime and long-term ownership costs |
| Warranty and Support | Warranty duration, coverage exclusions, response time, remote support, and local repair availability | Compare coverage for LEDs, power supplies, control systems, frame components, and labor | Written warranty terms, service-level commitments, and escalation contact details | Reliable support is important when equipment downtime directly affects appointment capacity |
| Installation and Training | Delivery, assembly, electrical requirements, staff training, and operating documentation | Compare installation time, room requirements, staff competency materials, and treatment protocols | Installation checklist, training agenda, user manual, and cleaning instructions | Good onboarding helps reduce setup errors and improves treatment consistency |
| Total Cost of Ownership | Purchase price plus shipping, installation, electricity, consumables, servicing, and replacement parts | Calculate cost per session using expected sessions, electricity consumption, and annual maintenance | Formal quotation, power-consumption data, parts pricing, and maintenance estimate | A lower purchase price does not necessarily result in a lower operating cost |