Square Headlamps for Work, Repairs and Outdoor Use

No. It usually describes the housing or lens shape. Look for beam-pattern information and intended use in the manufacturer's product details.

Only if its mount or strap is designed to secure to that helmet. Check the helmet and lamp makers' compatibility guidance before use.

Not always. Some compact work lights have clips or magnets instead of a headband, so confirm the included mounting system.

Rechargeable models suit frequent access to charging; replaceable cells can be useful where charging is unavailable. Runtime and cold-weather needs also matter.