Sorry guys, let me explain.
The soft fade on the QP2L-X BM I'm talking about is when you are on med or high with a loose bezel, and then you switch back and forth with max by tightening and loosing the bezel - the light "softly fades" brighter and dimmer with max reducing both the contrast and switch over speed, if for example, you wanted to single Morse Code. The low voltage XML works like an on/off switch when alternating between max and ANY lower mode.
Reason this important to me is that I use a work-around to produce a single-handed momentary max "switch" from ON (ie, any lower mode in use) on the Pro UI and I want the instantaneous response and hard contrast. It essentially works like car high beam flashers and has become my favorite UI "feature" of any light. If you are using a loose bezel lower mode but are close to the tight bezel activation line, then any sideways press on the head will momentarily activate max for as long as pressure is applied - release pressure, and the light returns to the previously used lower mode. You don't need to actually twist the head (which means it can be done single-handedly), and the battery spring and o-ring will always default the light back to the loose bezel position (which means max is truly momentary). With an underhand grip you just press on the bezel with your thumb, and with an overhand grip, you position a pinkie under the bezel, and thumb under the tailcap and just squeeze - there's plenty of finesse to signal a fast Morse Code... but not with a soft fade in there.
Uses?... I walk my dog on the 3 lumen low (I like my night vision) and use the momentary max "switch" to 1) spot him off leash at distance; 2) fire off a couple millisecond flashes at approaching cars to warn them pedestrians are ahead 3) check that bump in the woods. Same thing checking the bump in the night at home... I'll walk around inspecting the house on moonlight or low, yet ready to instantly fire off 400 or 800 lumens if I need. To be honest, I couldn't imagine trying to do this with a true tactical UI (momentary max from OFF) - what are going to do, blind yourself trying to clear your home with the light on? or stumble around in the dark with the light off? And imagine the effectiveness of a defensive flashlight that softly faded up from 5>800 lumens .
The soft fade on the QP2L-X BM I'm talking about is when you are on med or high with a loose bezel, and then you switch back and forth with max by tightening and loosing the bezel - the light "softly fades" brighter and dimmer with max reducing both the contrast and switch over speed, if for example, you wanted to single Morse Code. The low voltage XML works like an on/off switch when alternating between max and ANY lower mode.
Reason this important to me is that I use a work-around to produce a single-handed momentary max "switch" from ON (ie, any lower mode in use) on the Pro UI and I want the instantaneous response and hard contrast. It essentially works like car high beam flashers and has become my favorite UI "feature" of any light. If you are using a loose bezel lower mode but are close to the tight bezel activation line, then any sideways press on the head will momentarily activate max for as long as pressure is applied - release pressure, and the light returns to the previously used lower mode. You don't need to actually twist the head (which means it can be done single-handedly), and the battery spring and o-ring will always default the light back to the loose bezel position (which means max is truly momentary). With an underhand grip you just press on the bezel with your thumb, and with an overhand grip, you position a pinkie under the bezel, and thumb under the tailcap and just squeeze - there's plenty of finesse to signal a fast Morse Code... but not with a soft fade in there.
Uses?... I walk my dog on the 3 lumen low (I like my night vision) and use the momentary max "switch" to 1) spot him off leash at distance; 2) fire off a couple millisecond flashes at approaching cars to warn them pedestrians are ahead 3) check that bump in the woods. Same thing checking the bump in the night at home... I'll walk around inspecting the house on moonlight or low, yet ready to instantly fire off 400 or 800 lumens if I need. To be honest, I couldn't imagine trying to do this with a true tactical UI (momentary max from OFF) - what are going to do, blind yourself trying to clear your home with the light on? or stumble around in the dark with the light off? And imagine the effectiveness of a defensive flashlight that softly faded up from 5>800 lumens .