The Nitecore P30. Single 18650, 95,500 candela, 600m throw (claimed - more realistic would be 400m), 1" body, 2" head, it does come in at almost 6". It is longer than your spec, but it is still a very compact light, especially for the throw it has. The extra inch is in the reflector, which is very deep and results in a very narrow and focused beam, as can be seen by the candela number. It still has a nice spill that lights up the intermediate area without overloading your vision. I wear mine on my belt at about 4 o'clock, and it doesn't feel uncomfortable at all. Well worth the price, even if you pay the MSRP. If you look around you can find sales an coupons to bring that down.