wrote:
I have a laser level but it will not show up in sunlight.

Laser levels shoot a straight line but are not necessarily level. The
ones I've seen have lousy bubbles. The only way to know you are level
is to shoot from two different bench marks from each direction. If it
is dead on from both directions it's level, otherwise the difference is
double the error. Surveyor's levels are tested exactly the same way.
Laser levels show up fine after dark,
Bugs