This is in stark contrast to anything I have ever posted here before- that might be too much light. Under water if there is any sediment, light reflects a little like it does in the fog. An intense beam becomes a blinding wall of light. Unless you have very clear water to dive, you might want to try an overdriven XML2 first.
Nice looking reflectors, check out this thread about beam shots of the XHP70. And post what you build and learn so I can follow suit.