Check it out, Ocean Optics does a bunch of cool things, including the gel analyzer and color identifier we've always wanted! http://www.oceanoptics.com/Products/sea-series.asp Also, some things I've "discovered" about the Seachanger. The unit is so durn heavy because of the complex optical train. There are at least 3 lenses in there. The weight of the low voltage transformer is negligible when compared to the weight of the optical train. Thus, that answers the question of why they are so heavy. Also, if they make a Seachanger wash that uses the reflector of the source 4, but a Fresnel lens, why hasn't anyone made a Fresnel style lens tube for the Source 4 body? Obviously, it can be done. If there was a lens tube that let people get the soft flood of a Fresnel lens, but still use the shutters, I'd bet people would jump on it.