So I just bought mine, and haven't taken it underwater yet...I bought it with a sport HD II also from intova.
Here is what I can tell you: 140 degree spread - yes, a large solid orb of light - no hot spots, even light edge to edge. After seeing it used with a POV camera its a bit over overkill though:
These POV cams measure FOV diagonally...a 140 degree FOV diagonally is about 100 degrees horizontally, so I don't really need a 140 degree light. I imagine the go pro is the same, horizontally I doubt you get 170 degrees. You likely get down to 120, and once you put it the water it likely drops a bit.
Bottom line is that if you are comparing the brightness of the light, you will find the galaxy 2500 to be about as bright as the sola 1200 - the sola 1200 only has to put its 1200 lumens in a 60 degree beam, the 2500 galaxy spreads it much wider...and therefor loses some lux. Still, its much cheaper than the sola 1200.
I'll post some videos in a couple of weeks....so excited to try out my new toy....and Roatan is a great place to try it out.
Ray