Industrial application of nanosecond pulsed corona technology for air purification requires high volume, high-power plasma reactors. Cylinder-wire type reactors require multiple cylinders to meet these demands. Variations in pulse waveforms per cylinder, misalignment of wires, and jitter in streamer inception could lead to an uneven energy distribution over the cylinders. Nanosecond ICCD imaging is applied to a semiindustrial scale pulsed corona reactor to study streamer inception and propagation of the streamer plasma simultaneously in 16 cylinders. The images show streamer inception of all cylinders within 9 ns. Streamer propagation and intensities are very similar for all cylinders.