Flash light

[Chris H]

Advanced Open water?  If that is the case, certainly any of the lights mentioned will work.  That said, try to decide where you want your diving to be in the future and buy something you don't have to throw away later and rebuy so when you want a real primary light you can use the money for it.  For example, the UK SL3 is a Halcyon Scout style light that is easily clipped and stowed on your harness if you planned to get into technical diving in the future.  They are around $60.  In the Tech Diving arena, $500 doesn't get you much.  Add a 1 in front of the 5 and you'll be golden ;o)  None of this stuff is cheap, but there is no point in buying a bunch of stuff only to have to rebuy it later.