I used to work with biofeedback, but good equipment is quite expensive. I doubt that you´d get good stuff for that prize, but if you dare... try it and give us a feedback!
So yeah, unless you were just tripping on something while using those, I couldn't imagine a bunch of lights strobing directly at my eyes... doesn't seem too relaxing...
I tried that at a rave once.....I think. I sat in a deck chair, they put some headphones on me with some like sounds of the seaside music and some sunglasses. When you closed your eyes you went on a mad trip but on your eyelids. It was good fun, especially if your rolling at the time! Did give me a bit of a headache though afterwards though, but again that could be due to the rolls. Dunno about all this stuff about it shifting your conscious or what not.