A couple of days ago, it was these:
Left to Right (First five, on-person; last five, including the HC50, in a backpack compartment):
- Fenix E15 2016 Edition (the only 16340 light in the bunch)
- Zebralight SC600w Mk III
- Zebralight SC600w Mk II L2
- Eagletac DX30LC2
- Solarforce L2P host, with B6 stainless bezel and Sportac Triple Nichia 219B 2-mode drop-in
- Solarforce L2N with B6 stainless bezel, and Erik Kress XM-L 7C 5-mode drop-in
- Solarforce L2N with Customlites XP-L Hi Neutral White (5000K), 3 amp driver, 3-mode drop-in
- Fenix PD40 (the only one in the bunch running on a 26650 battery) - MTG2
- Nitecore P25
- (In the foreground) Nitecore HC50 Headlamp
I like having multiple tint options at my disposal, whenever possible. I prefer having at least one cool, one neutral, and warm light, readily available. I tend to use neutral emitters, the most of all, and I find that the Nichia 219B triple in the Solarforce L2P, and the neutral emitters in the Zebralights are the most heavily used lights, among the bunch, in most instances.
When I can only carry one light, on person (at work, for instance. In instances like that, the others are in my pack, which I have within arm's reach), it's always the Zebralight SC600w Mk III. It's extremely flexible, with a wide range of outputs, a super intuitive user interface, and fantastic thermal regulation.
I wish all lights were thermally regulated like this, rather than having fixed timed step-down output.
About the only thing I miss, while using that, is having the momentary feature (no forward clicky tail switch). Aside from that. it's a perfect EDC light, most of the time - easily pocket-carried. The neutral tint on that light is superb.
A dedicated headlamp can be extremely handy, albeit not heavily used. It's like having a spare tire for your vehicle. You never known when you'll need it, until you need it. Sometimes, it's invaluable, being able to have both of your hands free, while doing work.
I tend to favor 18650-based lights (even for EDC), because of the higher output performance, and the much longer run times (on the lower outputs). This kind of flexibility is very important to me, and the added weight of carry feels like a small price to pay, for this flexibility.