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Point taken.

The colours of eyes of (most) Tabanidae is caused by reflection of light at the lense. This is different from most other flies, in which the colour is caused by the inner side of the facets. Its own colour, so to say.
And since reflection is dependent on wavelength of the light, different light sources may cause different effects !
Therefore, always keep track, please, if horseflies are flashed, of not.


Theo