I've used the green ones before. During the day in September (unless you are in dark timber) you can't see worth a crap. Late evenings and early mornings, when the sun isn't out, they work great.
I just about threw mine away because I couldn't see a darn thing 95% of the time. Then I used them on an overcast winter day and they were bright as heck!!
They aren't legal here in Idaho, but I like to shoot them for fun, and I don't think I would buy them again because you are pretty limited on when you can actually see them.
I guess if your guide wants them, you might oughtta get'em.