When sourcing portable torches, the primary metric is Luminous Flux (Lumens); for industrial or outdoor use, seek a minimum of 1,000 to 2,000 lumens. Pay close attention to the LED Emitter type (e.g., CREE, Osram, or Luminus) as these determine efficiency and heat management. Additionally, evaluate the Beam Distance and whether the lens supports Adjustable Focus (Zoomable) for switching between floodlight and spotlight modes. Ensure the housing is made of Aviation-grade Aluminum Alloy (6061-T6) with a Hard-Anodized finish to prevent corrosion and scratches.