Hello, I'm wondering what handheld lights people are using for cave and/or wreck diving? I have no intention of cutting the cord and will keep using my LM canister as my primary primary light but would like to get a handheld as a backup primary for cave diving or to use in the ocean fro wrecks when I don't need long burn times. I see a lot of people seem to be using the Dive Rite LX20 and the Big Blue TL4800. I also see Light Monkey and Halcyon have offerings. What are your recommendations for a good handheld (the ones I've mentioned or any others I'm not aware of) that can be used as a primary when needed, recognizing the burn time limitations?