I have a Lightwave Saber SL-5 and when I replaced the factory strings have always used the Dean Markley SR-2000 strings. I really like the because of the brightness and sustain.
I saw the SIT Power Core strings advertised as having brightness and sustain. They have an exposed core and the ends are very similar looking to the SR-2000's.

The Dean Markley SR-2000 "B" string on the left and the SIT Power Core "B" on the right.
I notice that he DM string has a tiny wind around the core and it also looks like there are three layers of strings wound on the rest of the string, where the SIT has nothing on the core and only two layers of thicker winding on the balance.
I have not installed the SIT yet. I ordered two new sets one of each in case I decide I don't like the.
The SIT set was cheaper and made right here in Ohio.
Kirk
I saw the SIT Power Core strings advertised as having brightness and sustain. They have an exposed core and the ends are very similar looking to the SR-2000's.

The Dean Markley SR-2000 "B" string on the left and the SIT Power Core "B" on the right.
I notice that he DM string has a tiny wind around the core and it also looks like there are three layers of strings wound on the rest of the string, where the SIT has nothing on the core and only two layers of thicker winding on the balance.
Code:
String Gauges
DM 44 60 78 98 125
SIT 45 65 80 100 125
I have not installed the SIT yet. I ordered two new sets one of each in case I decide I don't like the.
The SIT set was cheaper and made right here in Ohio.
Kirk