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I mainly do non-technical wreck diving in the Gulf of Finland. While good lighting is very important, I'm willing to go with a cheaper light until I get into more serious stuff. I had a 740lm Magicshine MJ-810E flashlight for a couple of years, while it has worked fine, the non-standard battery has proven to be problematic. I can't buy spares anywhere, and sometimes there's no possibility of recharging between diving days. I recently replaced it with a 1000lm Brinyte DIV 11 and was positively surprised by the build quality, so now I'm considering getting the DIV 10 as my main light and moving the DIV 11 into backup.
Interesting points about actual lumens, I might take the DIV 11 to a local flashlight shop to have its actual output measured. It's brighter than the Magicshine though.
If you think Magicshine's battery (18650) is non-standard and problematic, this DIV10 uses 22650, which is an even less common battery. Replacement choice is more limited and harder to come by compared to 18650. I won't think it is the right light for you.
Hi Midge
Let me know how it goes with the switch repair, mine is on the way out. As you say it's an impressive light, would be a shame to have to bin it for the sake of a simple switch.