These come up on Ebay once in a blue moon and look like a good solution for someone without a real darkroom...but I know absolutely nothing about them. Is it such a good solution? I imagine that dodging and burning isn't something you can really do when using one of these things.
Another question, though, is this: how easy would it be to convert something like that for alternative processes? I know that times would likely be longer due to having to use lower wattage bulbs, but I'm assuming that, baring that, it would work decently. There's also always the rewiring route, but in that case I'd be better off building something.