It could be either. There is a white lamium (Lamium album) as well as a white flowered variation of Lamium amplexicaule, aka white henbit. Both are widely naturalized across much of North America and generally considered weeds.

There is also a white flowered form of the ornamental spotted deadnettle, Lamium maculatum, 'White Nancy'.

It isn't Lamium album. Nor does it resemble L. maculatum. In all aspects other than colour it looks like L. purpureum, so my guess is a very pale example of that species. The link shows both white and the commoner dark pink versions. https://plantsam.com/lamium-purpureum-2/