I find it extremely unlikely that either was the source light that could have drawn these men out into the woods in the first place. To me that explanation is a serious stretch
Ludicrous is more like it. It's not as if these highly trained men, on duty guarding nukes, had just been parachuted into the area. The lighthouse promo is typical of an explanation almost as outlandish as flying alien craft.
Maybe someone with military experience can help me out here. But I'm assuming these guys had been screened for psych stability and trained to react to unusual situations with steady nerves. I'm going to give them every benefit of the doubt and assume they were straight, sober, and in a serious state of mind. We're not talking High School teenagers in the woods with flashlights and herbs. Gimme a break.