Yeah, superbrite puts out really good products. I discovered them when I first installed a set of prow lights on my jetboat. The factory bulbs were 55W halogens, and when I'd turn them on, the voltage meter on my console would DROP, from the excessive amp drain, of 5 amps each. Even though my engine's voltage regulator puts out about 15 amps at 6K RPM, it wouldn't keep up.
So, I bought MR-16 LED's to replace them. They are the same intensity as 55W halogens, but a fraction of the amp draw, at 1/2 amp each. Once I saw how effective these were, I replaced all the incadescent lights on my jetboat with LED's. I can run all my nav lights, prow lights, and all the lights of the guages of my console, and the volt meter doesn't drop at all!
I highly recommend superbrite LED's.