I may be the first one to actually compare these two lights.
The TWM-850 is as bright as the TLR-1HL, except that they TLR-1HL has a white beam, whereas the nightstick is blueish, and the HL has a wider hotspot, and its hotspot ends more distinctly.
The Streamlight comes with a strobe feature by default only available on the night stick if you pay like 10 to $15 more, and its controls are much easier to manipulate. Finger tightness brings you a rock solid mount with the Streamlight, whereas you need a coin to finish it off on the nightstick. Also, the Streamlight has a very robust clamp mechanism that does not require tools to change batteries.
Nonetheless, it may be for several tens of dollars less and it's pretty good, bright, solid, uses the same batteries, and fits all the holsters for the Streamlight. I like them both, but the Streamlight is battle-proven.
#glock #mandp #streamlight #nightsick #weaponlight #tlr1hl #tlr #twm #twm850xl #edc