M6 reliability

[ADDICTED2LITE]

How reliable is the M6 with a LF-M6R and 6xIMP16340 cells in the MB20 carrier? What kind of runtime can I expect?
I also have a MN15 and 6 primary cells in a SC2 for a backup long running light. Is the MN15 a safe reliable option for a backup? How much runtime can I expect from this setup?

 

[kelmo]

I primarily run a MN15 in my M6. It will give at least 2 hours of quality light with constant use. I have done this. Can't comment on the LF lamps with rechargables.

 

[LED61]

The MN15 is being overdriven over factory specs. But the setup is beautiful. One MN15 turned dark on me after 8 hours use so since then I break in a fresh set of batteries with the MN20 before I use the MN15, just to be safe.

 

[DM51]

The HO-M6R is a great bulb, and will work fine with the IMR16340s in the stock MB20 battery holder. You'll get about 25 mins run-time from 1 set of cells.

The MN15 is an excellent back-up, but as you have noted, it needs primaries rather than rechargeables in the MB20.