Bright purple

I still don't polish my nails, today was my 9th day, so only 5 days to go =). In the meanwhile I'm gonna show you first BarryM polish that I tried. It is called Bright purple, I applied 2 coats, it applied well. I didn't add TC. Here are the pictures:

in daylight


and in my light box


I don't have any idea why my light box makes every polish look like it has a satin finish. 
Do you have any idea why?