Dear authors,

The idea using such a device to try to measure the actinic flux profile is really interesting.
From my point of view, summarizing the reviewer's comments, I see three major issues:

a. the disadvantages in the interpretation of the results using not well spectraly characterized sensors

b. The problems related with complex atmospheric situations simulated only by a single layer cloud

c. Major issues in the presentation of the results that were extensively addressed by the second reviewer.

For point a. there is not much more to do, as you added an analysis of different wavelength bands. (of course a measurements of the device spectral response would be the ideal). Then there are issues analyzed and reported thoroughly by the reviewer 1 which affect part of the major findings. So a paragraph on the conclusions referring to this issue and the possible effect on the discussed results would be appropriate and very helpful for the readers of this work.

For the point b. you have chosen not to try more model simulations using multiple layers but to comment on possible differences of the single layer approach to real more complex cloud conditions. I suppose that this approach makes related the conclusions weaker, but i will respect this option of yours. So this could be also mentioned in the conclusion section, discussing possible differences from this approach (summarizing what you have already wrote in the revised main part of the document).

Point c. I think reviewer 2 has done an impressive work and helped a lot on the presentation and the clarification of the results. There are several issues that had to be approximated since this is a difficult measurement and modeling exercise. I think you have answered the comments and suggestions, eliminating or adding sentences and adding new figures. I think that there are sentences in the conclusion section ( like the cloud top and AF link) that also need revision after implementing all these suggestions.

In general I think that this is an interesting work worth to be published in ACP after including the above suggestions.