LED strip lights are the most versatile lighting products and go smoothly with your requirements. They complete your mood lighting needs with extreme flexibility and durability.
The answer is yes, both sides of the strip light will work even after you cut them. The main reason is the designated cutting points.
The cutting points are a safe place where you can carve the strip lights without damaging them.
Cutting outside the designated area will damage the individual circuit. So you need to revive and trim back to the closest cutting line.
If the LED strip lights operate with different brightness shades, then it faces a voltage drop.