I've been asked to shoot some models in a swimming pool at night. I wanted to use gels on strobes to add color to the water. I don't have underwater lighting, so I was going to place strobes somewhere around the outside of the pool. I'll be operating them off a battery and will use GFIs for extra protection. My concern is how to get the colored light into the water. I'm worried it will bounce off and do little. I have some pretty powerful lights -- a whole range of Alien Bees and White Lightnings. I've used them before around a pool, but not with gels. Any ideas? I could've sworn I saw some photos of models in a pool with colored lights, but I can't find them now and am not sure if they used strobes or had a high-ISO camera and just sued the pool lights.