400W 20,000k Ushio

[Just2Bad]

I didn't find much on RC... nobody seems to use this bulb.... This is a Ushio 400w blue blub like you said and like radium that are blue bulb also. They run on a standard probe stard M59 ballast. So if the radium blue bulb is good for coral growth why the ushio could not.... I must say that the ushio is a bit bluer than the radium.. I tested both side by side on someone tank. And the ushio wasnt overdriven like the radium are....