If you mean "a 9V battery capable of supplying eight or nine amps, and not a smoke-alarm battery", then yes, you can.
(I assumed an RGB strip, with 20mA per colour, per pixel)
If you mean "a 9V battery capable of supplying eight or nine amps, and not a smoke-alarm battery", then yes, you can.
(I assumed an RGB strip, with 20mA per colour, per pixel)