Sofirn-SP40A 1200lm Headlamp TN-3535 18650 Rechargeable Headlight TIR Optics Lens USB C Flashlight with Magnet Tail Cap

With extended use, the lamp performs reliably — several buyers have owned theirs for years, and some have purchased multiple units. Light output remains stable even during prolonged operation. Charging via USB-C takes approximately 4 hours with a standard charger. The rubber head straps are durable and withstand intensive use. The lamp is waterproof and works in rain. The 2700K color temperature is less bright but easier on the eyes; the 4000K and 5000K variants are brighter.

Complaints are minimal. Some buyers noticed a slightly greenish tint to the light in medium and low modes, though most do not consider this a problem. The rubber head straps have no clasps — the lamp must be fitted more snugly. One buyer mentioned slight haziness when shining directly into the eye. Critical ratings account for less than 1 percent.