Replacement LED Strips Too Short?

First time attempt at replacing LED backlights for me. Picked up an old LG 55" tv (LG 55UM7300PUA) that has an overly blue picture. Ordered some replacement LEDs off Ebay, and got them in this week. Part number seems to match (SSC_Y19_TRIDENT_55UM73), but the eight-LED strips are only about 22" long (as in, about half the length of the tv screen).

I haven't broken open the TV yet, but before I do so, was wondering if having LED strips so short compared to the length of the TV is normal.

Also, I noticed that the markings on each strip are identical (i.e., there's no "A" or "B" strip designation). Are these strips typically interchangeable among themselves?