Anyone running Hydras?

[Slick Fork]

For those running them;

How do you find, if at all, the "disco" effect? Does coverage compare to the SOL?

I'm running two Sol's on my 75gallon and am playing around with the idea of doing the SOL-> Hydra upgrade. My two concerns as far as the lamps go is whether the coverage is the same/better/worse than the Sol's and whether there is a bad disco effect. Also slightly concerning is the reports of the director disconnecting randomly and turning the lights on to 100%.