You will get over 880 lumens using 2 protected 18650 and WA1111 for about 45 minutes in same package size.
This is much brighter than MN16, less cost replacement bulb and safe for batteries.
Hi Fivemega. Very good point. I should like to say that I have used one of your excellent MN series bi-pin sockets with both the WA1111 and WA1274 bulbs.
I heartily recommend this socket to those of you out there using bulbs like the MN15 and MN16. This is truly one of FMs great inventions. After you pay for the MN bi-pin socket, the WA bulbs can be bought for a song. SF wants over $30 for their MN16.
What I found in running these two WA bulbs is that they both can be run off of AW's protected 18650s, such as the 2200mah versions. For me, since the WA1274s are 7.2V versus 6V for the WA1111, I used them more often. I blew a WA1111 with freshly charged cells rested for a day at above 7.2V. (I consider 7.2V to be about the max. for the WA1111s...) I calculate that for the WA1274, I estimate that I got in 350+ OTF lumens. In my old eyes, the beam output of the two bulbs looked fairly similar.
Again, both of these bulbs are other examples of very bright incan options that do not require IMR cells. I think there are some others, but these two are prominent in my thinking.