Trying to ID a lily by a photo is usually problematic at best.
If it is a distinctive looking lily then you might at least get in the ballpark.
However with a white that appears to be a hardy it would be next to impossible to say for certain.
There are too many whites that share a lot of the same characteristics.
The other problem arises from the picture itself. Is the color in the picture true to the color your eye would perceive.
Think about how hard it is to photograph Green Smoke and capture the true color.
ID'ing lilies is best left to experts and then in person so they can see the bloom inside and out as well as the pads.
Nice shot by the way.
Tim