I EDC one H502w for whenever I want a 40watt bulb worth of smooth even brightness, running off a 14500 or an AA.
I also use an H502r (with the XPE red color) as an extra Blinky-light on my ankle when I am riding my bike. Wide beam so that cars can see me from many angles.
I love mules and the quality of light that they put out. Unfortunately, they lack versatility: if I can have only *one* light, it would never be a mule. That's why I EDC the H502w along with an H52w and an SC64wHI. And the mule is the first I leave behind if I have to slim it down.
(Then again, if I could restrict myself to one light, I would not be on this forum.)