I don’t know where the ceiling is with flashlight brightness, maybe when it has enough to call it a lightsaber. There has been much debate from Law Enforcement about what is optimum for doing entries and how much is too much. The majority that I have spoken to believe that around 200 Lumens is optimum for indoors while outdoors it’s a completely different mindset. The most important thing you need to know about when considering a flashlight like this is, you are far more likely to be able to identify a threat with a Streamlight TLR-1 Flashlight or the new compact model Streamlight TLR-6 laser light combo.
Flashlights have gotten cheaper to make, with longer run times and double or triple the Lumens compared to 10years ago. Streamlight TLR Flashlights are a “staple” in this industry are they on just about every Handgun or Carbine. They have become extremely popular as a Carbine “white light” due to there being an industry move away from pressure switches and people realizing that the lever activation switch is far more reliable. The New Streamlight TLR-1 HL has an output of 800 Lumens which is quite incredible. Everyone should have a light on a Carbine but there is such a thing as too much output.