Panel, mask, belt or mat?
A panel provides a separate light source on a stand or mount. A mask follows the shape of the face or neck. A belt fastens around a smaller area; a mat offers a larger flexible surface. Compare placement and coverage before comparing advertised wattage.
660 nm, 850 nm and other wavelengths
660 nm red and 850 nm near-infrared are common examples, not universal specifications. Ask for the complete wavelength list and whether channels can be controlled independently. Distinguish light output from a separate heating function.
What determines the price?
Price changes with active coverage, output documentation, housing, controls and kit contents. Check whether a stand, controller, eye protection where required and power adapter are included. Request comparable quotes for the same intended use.
