This post has been some time in the writing, because I live in Northern England and this polish is photo chromatic actually finding some sunlight to activate it took a few months!
[Indoors, No Sunlight]
[Outdoors, Direct Sunlight]
Colour | Blue / Purple
Finish | Flakie / Photochromatic Opacity | Three Coats Shown Brush Type | Flat and Wide How Much | 10ml