The INOVA light you showed are ok. I carried a red one attached to a button hole on my DCU top while i was in Iraq. I found my first one and it worked great. It did crap out though (I probably beat it up pretty good) and I was able to buy a second one also red but the on/off switch broke so it stayed on all the time. Since this is not very tactical I had to use the permanent off switch (size 9W Altama Desert Boot). So I bought two more after opening the pack and trying them out. To make a long story short I had one (red) that worked and one that the batteries and the little rubber cover for the batteries would not stay on so I chunked it. I still have my last red one and its a good little light for 6 bucks but I had to go through 3 to get one and the US Army PX system would not take returns or grant refunds. I personally have bought several of the Photon 2 lights (chose the 2 over the 3 because I wasn't sure if I needed the flashing option). I have one in my EDC, one that is inspectable equipment for my wife and others strown here and there. They are very bright and do not take up space. I wish I had saved the corpses of the three INOVA's that I had to destroy so i could have mailed their bodies back to the maker with this story. I just don't feel they are reliable enough to recommend for everyday use.
Raider