These headlights really dig. The build quality looks good. The plastic case seems pretty solid, but it's basically a lattice-like support structure with the internal electronics clearly visible; By no means try to use them in wet or wet weather (not many flashlights are built for that anyway, so it's no knock). This has the benefit of high airflow, no need for fans and the electronics should last a long time. Let's get to the best... light quality. It is bright, has a high color rendering index