I found this article while looking for information on beam pattern comparisons. I couldn’t improve on it, so I’m sharing it.
Streamlight Flashlight Beam Patterns
Having the right flashlight that meets your lighting needs is important. That's one of the reasons Streamlight developed three series of lights:
Tradition, High Performance (HP) and High Lumen (HL). Each series offers a different balance of features and can be used for a variety of applications
Tradition Series: Meant for general, multi-purpose use, these lights are designed for the broadest range of lighting applications at the best value. Characteristics include: Optimal balance of candela and lumens, longest regulated run times, the best value. Uses include:
Day-to-day industrial use, law enforcement duty light, maintaining vehicles, general contracting work. FlashlightDistributor products include: PolyStinger® LED/DS® LED, Stinger® LED/DS® LED, Strion® LED, TLR-1®/TLR-1s® (weapon-mounted light), TLR-2®/TLR-2s® (weapon-mounted light). http://www.flashlightdistributor.com/Streamlight.aspx?Streamlight=75660
High Performance (HP): A good choice for down-range applications requiring optimal beam distance, as these flashlights throw light a long distance. Characteristics include: High-candela beam, delivers long-range lighting, sheds a bright peripheral beam. Uses include: See all the way to the end of a dark alley or down a wooded path, inspecting utility lines from the ground, search and rescue missions and Down-range illumination. FlashlightDistributor products include: Stinger® LED HP/DS® LED HP, Strion® LED HP, TLR-1 HP™ (weapon-mounted light), TLR-1s HP™ (weapon-mounted light). http://www.flashlightdistributor.com/Streamlight.aspx?Streamlight=75860
High Lumen (HL): Gives you maximum illumination, providing full situational awareness by delivering extraordinary brightness in a wide beam pattern. These lights are ideal for smaller areas where you need a lot of light, but not an exceptionally long reach. Characteristics include: High lumen beam, delivers maximum illumination, provides a good level of candela. Uses include: Clearing a dark scene or searching an alley, lighting a campsite, vehicle stops or searches, wherever you want wide scene illumination while still being small enough to fit in your pocket. Flashlight products include: ProTac® HL™, Stinger® LED HL™/DS® LED HL™, Strion® LED HL™, TLR-1® HL™ (weapon-mounted light), TLR-2® HL™ (weapon-mounted light). http://www.flashlightdistributor.com/Streamlight.aspx?Streamlight=75453