Weight
I used to think the more metal, the better, but I've been backing off of that reasoning because a mass of metal will hold heat longer. More mass might help in the first few seconds, but dissipating that heat is a slow process, not to mention the carry weight can get ridiculously awkward.
Here's some weights taken with similar lights I have:
WT90: 756 g
HK90: 1126 g
MF02: 812 g
MT07: 807 g
MT03: 563 g
TN31: 567 g
Out of this list, the HK90 is basically the exact same size (same height, same width at the bezel and battery tube). The MF02 and MT07 are smaller lights, but still heavier. The MT03 is a very different compact design, heavy for it's size. The TN31 is perhaps similar to the WT90 in that it's relatively light for it's size, but is a smaller light.
Tests with the Vapcell T50
The nice thing about the carrier is that it has no flat top blockers around the + end contact, so I can use the stock Vapcell T50's with their recessed + end.
With the T50's fully charged to 4.21V, using the Maukka calibrated lumens tube (TA style):
- lumens at start: 5333
- lumens at 30 secs: 4857
- throw, taken at 5m on an Extech LT45: 979 kcd
With the same cells after about 1 minute on turbo from the tests above, paused a few minutes, then ran a 4 minute test. Interesting that the lumens actually started out slightly higher than the previous test, but could be minimum random results from re-positioning the light. I took readings every 15 seconds. In summary, this is what it looks like.
start 30 s 1 min 2 min 3 min 4 min
5363 4896 4824 4727 4648 4581
- The batteries were pulled and measured 4.07V at this point, after about 5 minutes of turbo runtime
- I forgot to take temp measurements, but a little late, maybe 30 secs after the test complete I measured 46C at the hottest spot on the outside, near the switch
- It was a bit uncomfortable to hold for a length of time, but certainly could be held and can easily be operated
I can't measure amps at this point with this light on 3 batteries in parallel, but it's probably about 20-24 amps, based on the measured lumens.
*** Note: This is all on the stock light, but it is still a prototype, so results may depend on what mods are done going to production, if any.