hhmmm. Is this an indica plant ? or a Sativa plant?
Because Sativas take much longer, and this could explain why there are hardly any orange hairs, which you would expect there to be lots of by the 9th week of flowering an indica.
Another likely scenario is you accidentally delayed the flowering process. Even though you switch to a 12/12 light cycle, it's not a given your plant starts flowering right away. You may have been exposing your plants to light when they were supposed to be in their dark period of their 12/12 cycle, or the plant wasn't mature and has to finish developing before it truly began flowering. Now considering your plant looked it had been flowering only about 3 weeks when you posted at 5 weeks of flowering, I would say it didn't flowering right away, and you may have to wait another 2 weeks longer than normal.
Low light levels at first may have also delayed things a little. The main things is, you're on the right track now, just watch for the appearance of orange hairs. Your plant should be 3/4 orange hairs when it is ready to harvest.
It's actually kinda good your plan still looks so young for 9 weeks. This means it should get much bigger still, maybe even double in size. Make sure you are using a high (p) fertilizer (organic is best), try bat guano, or bone meal. Stir in a little molasses every second watering if you are not already doing that. Molasses also apparently has an N-P-K value although I'm not sure what it is, but the sugars will help fatten buds.