Ok guys I recently purchased a Preon 1 locally after having to get rid of most of my lights to help financially a few months ago but when I turn this light on its got sort of a green tint to it I was told by the store owner who sold it to me it was the XP-G R5 version cause he bought it before the S2's were available now what I am wondering is if this is correct. Is there any way to visually tell the difference between the S2 and R5 by looking at the emitter?