It is not you.  There is a lot of fake forest fire going around town.  I have some of the fake stuff and it was not great.  I have had it under 400W 10K metal halide and it will only barely get green - you are not going to find more, or higher quality, light than that.
I would not sweat this too much unless you got the frag from a 100% reliable source (probably on the internet).