Seeing some posts here about laser bird repellent equipment, I looked into studies o lasereffectiveness repelling birds and deer.

the laser repellents being sold for birds are stated to work at NIGHT. The birds that eat my grapes visit in bright day>

Laser repellents were studied for deer and did NOT work day or night.Deer incidentally can see blue,not red or green so well but no color of lasers repelled them.