1st time G.

@Bigwerm, even though the strain you are growing states seed to harvest in 10 weeks, you might actually need 12-15 weeks for your plant to fully mature. It’s a matter of personal preference really, as to how you like your finished product (bud). So, it’s never to late to change out your lights or add additional lighting- in fact your plant would most likely benefit significantly from it. Keeping in mind the size of your plant already, I would put off adding HID type lighting until this grow was completed. The heat from those types of lights would most likely fry the top of your plant. But you could easily/safely add fluorescent or led lights at any point throughout your grow and watch your buds fatten! All the best!