This is an issue that will not go away and I think one reason is the advertising by the manufacturers. I've asked some of the trail camera manufacturers to share their evidence of "flash spook" and so far they have either not answered, revealed that they do not have evidence that white flash spooks deer or they have just told me that they know that it does. I cannot find a study that shows that the white flash spooks deer and I have been asking and looking.

One thing I want to mention is that if you get a flash picture of a deer jumping away from the camera then you DID NOT get a picture of the deer reacting to the flash. Deer are quick, but not quick enough to beat the flash. A picture of a spooked deer is a picture of a deer that was spooked by something else, possibly a noise made my the camera. Once the flash goes off the picture is taken, there is not a delay between the flash going off and the picture being taken. Deer are not faster than the speed of light.