We hope for a positive decision regarding the publication of this article in this journal.
The topic is timely and the results provided are interesting. However, most of the results provided consist in photographs of the discharges: while these are clear and descriptive, they provide a qualitative information only. A spectral analysis is given for one discharge only (discharge in air with a copper electrode): more quantitative results, such as a spectral analysis of the other discharges also, would be helpful for the comparison between the discharges produced in the lab and the ones observed in the atmosphere.