You may not want to plug the drain holes, if excess water can't be released then you could run into root rot problems from having standing water at the bottom of the pot. Not sure why you'd have a lot of run-off if the soil is very dry, you could look into submerging the pot in water to make sure the soil is set well and the water isn't simply running down channels in the soil? Read up on it first though as I have never tried this but it seems to work for some people. She looks really good so far, if you have any worries it'd be better to put her into flower a little bit early rather than waiting too long and facing the possibility of her overgrowing your space. It's really your call on the flowering, she'd probably do well if you started in the next day or two, but can't say for sure how much difference another couple days would make.
As far as copying the lighting setup I use, the reason it works for me is the plants I grow under it and how I switch the lights around. You can adapt the idea in many different ways to achieve appropriate lighting for however many plants you choose to grow, but you have to take into account that CFLs and small HID are fairly weak compared to high wattage HID lights so they work best with a flat canopy from SOG, SCROG, or LST. I gave two basic examples of how I would consider upgrading if growing only weed in a small space like what you have, sorry they are long and rambling.
If you want to expand your production next grow without stepping up the number of plants too much, it may be worthwhile to get a small HID light such as a 150 or 250w HPS and then using CFLs for side lighting. Using CFLs to start veg growth and then moving up to the HID with CFL side lights could do you well. In a 3'x2' area you could place a 250w HPS in the middle with CFLs on the sides and fit probably 4 medium or 6 small plants in there. The key with any small lighting system is being able to move your lights all around, not just vertically, to fit the dimensions of the plant(s).
Example:
start 8 plants in 6" pots under CFLs, top at 2 weeks old and flower the tops you took (about 2 weeks?). then pull any males and up pot the females to 10" pots. continue to veg the females to 6 weeks with LST/SCROG under either CFLs or HPS or both and then flower under both.
If you aren't looking to expand much, maybe just two plants next time (should probably use fem. seeds if choose that), you could get away with using CFLs only or maybe a couple of the very small HID lights mixed in and have great results. In a 2.25'x1.5' area a couple of 70w HPS bulbs with the CFLs you have and maybe a couple more could cover two small plants very well.
Example:
start two fem. seeds in 10" pots and use topping/LST/SCROG to achieve a flat canopy and flower at 4-6 weeks. this could be done with a 70w HPS over each pot, with basic light reflectors using appropriate sockets, and CFLs around the outside of the plants to get uniform light distribution and even growth.
