I think Ramon has the right take on string tension. Also, Ron Fernandez writes about this in his article: "Some thoughts about the projection and fullness of guitar strings" located on his website http://fernandezmusic.com/DanielMariStrings.html
Interesting comments about the La Bella light rectified nylon trebles. I have used those trebles for several years. They have great intonation, durability and tonal characteristics, both warm and clear without getting glassy. Also, I agree about playing in the upper range, the tonal and pitch qualities remain consistent. So much so that it even effects choices about how to write for the instrument.
These strings (LaBella R-N L) are in fact thicker than D'Addario Pro Arte Rectified Moderate tension. The LA Bella's are measured: .028; .032; .040. The D'Addario EJ29 are measured: .027; .031: .039.
Also, both D'Addario and Savarez use .028; .032; .040 for their normal tension dimensions. But, at least in this instance La Bella calls that 'light' tension. In some of their full sets La Bella will identify these measurements as medium (they don't use the term 'normal').
Like many, many guitarists I have learned the hard way that more tension does not equate with more volume, better tone quality or better control.
Occasionally someone will comment about strings used by Paco de Lucia and I don't have any special incite on that except to say that he was using some kind of lower tension strings. I use Paco as the example because I know that high tension strings will not respond with that kind of clarity at those speeds. Playing down near the bridge gets the right hand the necessary control to play very fast, but the string response is that of a low tension string. Try doing those speeds with high tension strings and the point is most clear.
Anyway, those are my observations, for what they're worth. So...enjoy your new strings I think they are a great choice