400W 20,000k Ushio

[Delphinus]

The last time I cruised on over to www.ushio.com I did not see any reference to a 20000K bulb made by Ushio. I believe that there isn't one. There IS, however, a blue bulb. They have these coloured halide bulbs and I think they come in red, green. and blue or something like that. I wonder if the blue bulb is the 20000K bulb but it's been given the "20000K" label to try to sell some to us aquarium folk who jump all over products with certain keywords.

Here is the product info
http://www.ushio.com/files/Colorlite...eet%200502.pdf

Notice that (with the exception of the double ended 150W sized bulb which uses a M81 pulse start ballast) that they use the standard probe start ballasts. This means this could be maybe used on the standard ballasts but I'm kind of thinking that their usefulness is as a supplementation light for aesthetics but not really effective as a coral growout light or anything like that. Just my $0.02 though.

At any rate I don't have the info that you're looking for in answer to your specific questions about PAR and whatnot, but I wouldsuspect someone has looked at them. Try perhaps a search on RC and see if you can uncover anything. Let us know if you find anything out.