To many males!

Okay im not a pro growing and i grow indoors. So here is the thing Last time i grew seeds, i had 4 plants in a little growbox. All of them turned out male because i could see pollen sacks. That time i was using cfl lights. This time i am using a ufo 90 watt grow light and i grew 4 plants as well, And now i already got 2 that are male and the other 2 are still growing but im starting to see pollen sacks already! how can this be all 8 plants are male This is a coincidence or is this just bad luck? I am growing bcseeds and never had this problem before. Usually i see white hairs but on these plant i dont see any. only little leafs between the nods.

here is the led grow light i use : http://cgi.ebay.com/TRI-BAND-Pro-Hydroponic-90w-UFO-LED-Plant-Grow-Light-/320542784807?cmd=ViewItem&pt=LH_DefaultDomain_0&hash=item4aa1d6bd27

I dunno if it the light or if it is to close to the plants or to far i usually keep it about 6 inches away from the plant.

Please any suggestions or comments? And bcseeds is a good company so dont even bother with that suggestion. I never had this problem before just until recently.

Many thanks if i get any replies :-\

First off what kind of conditions are you growing in Temp, Humidity, soil/hydro, Nutes, light schedule, water pH, etc.
Second post some pics if you got them.